Modern Business Statistics with Microsoft Excel 5th Edition

ISBN 13
978-1285433301
ISBN 10
1285433300
Authors
David R. Anderson, Dennis J. Sweeney, Thomas A. Williams
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130 documents found.
341212
Exam Prep
CAL 112 Midterm 2
Exhibit 14-6 You are given the following information about y and x. Refer to Exhibit 14-6. The least squares estimate of b0 equals a. 1 b. -1 c. -11 d. 11 Answer: D Answer: D Answer: D Students of a large university spend an average of $5 a day on lunch. The standard deviation of the expenditure is $3. A
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CAL 113 Final
In a completely randomized experimental design, 7 experimental units were used for the first treatment, 9 experimental units for the second treatment, and 14 experimental units for the third treatment. Part of the ANOVA table for this experiment is shown below. Answer: a. Answer: a. Answer: a. Exhibit 12-3 In order to determine whether or
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CAL 131 Test 1
Exhibit 8-3 A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph. Refer to Exhibit 8-3. If we are interested
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CAL 136 Midterm 2
Political Science, Inc. (PSI) specializes in voter polls and surveys designed to keep political office seekers informed of their position in a race. Using telephone surveys, interviewers ask registered voters who they would vote for if the election were held that day. In a recent election campaign, PSI found that 220 registered
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CAL 149
An element of the sample space is a. an event b. an estimator c. a sample point d. an outlier Answer: C Answer: C Answer: C Exhibit 13-2 Refer to Exhibit 13-2. The null hypothesis is to be tested at the 5% level of significance. The critical value from the table is a. 2.71 b. 2.87 c. 5.19 d. 5.8 Answer: B Answer: B Answer: B Exhibit 16-2 In
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CAL 153 Test
Exhibit 16-3 Below you are given a partial Excel output based on a sample of 25 observations. Refer to Exhibit 16-3. We want to test whether the parameter 2 is significant. The test statistic equals a. 4 b. 5 c. 3 d. -3 Answer: D Answer: D Answer: D Babies weighing less than 5.5 pounds at birth are considered 'low-birth-weight
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CAL 156
The exponential probability distribution is used with a. a discrete random variable b. a continuous random variable c. any probability distribution with an exponential term d. an approximation of the binomial probability distribution Answer: B Answer: B Answer: B We can examine the effect of the sampling plan on both types of risks by varying the assumed a. percentage
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CAL 168 Quiz 3
Exhibit 17-1 Below you are given the first five values of a quarterly time series. The multiplicative model is appropriate and a four-quarter moving average will be used. Refer to Exhibit 17-1. An estimate of the seasonal-irregular component for Quarter 3 of Year 1 is a. .64 b. 1.5625 c. 5.333 d. 30 Answer: A Answer: A Answer: A For
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CAL 205 Midterm
The variance is a weighted average of the a. square root of the deviations from the mean b. square root of the deviations from the median c. squared deviations from the median d. squared deviations from the mean Answer: D Answer: D Answer: D Exhibit 18-6 It is believed that the median yearly income in a suburb of Atlanta
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CAL 242 Midterm 2
Exhibit 15-1 In a regression model involving 44 observations, the following estimated regression equation was obtained. = 29 + 18x1 +43x2 + 87x3 For this model SSR = 600 and SSE = 400. Refer to Exhibit 15-1. The computed F statistics for testing the significance of the above model is a. 1.500 b. 20.00 c.
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CAL 255 Quiz 3
Missy Walters owns a mail-order business specializing in baby clothes. Missy is confident the dollar amounts of all her orders are normally distributed or nearly so. Assume she knows the mean and standard deviation are $249 and $46, respectively, for all orders she receives. a. Describe the sampling distribution of ,
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CAL 290
The sample size that guarantees all estimates of proportions will meet the margin of error requirements is computed using a planning value of p equal to a. .01 b. .50 c. .51 d. .99 Answer: B Answer: B Answer: B In an analysis of variance where the total sample size for the experiment is nT and the number
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CAL 332 Quiz 3
If we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect the a. width of the confidence interval to increase b. width of the confidence interval to decrease c. width of the confidence interval to remain the same d. sample size to increase Answer: A Answer: A Answer: A Exhibit 14-4 The following
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CAL 336 Midterm
The adjusted multiple coefficient of determination is adjusted for a. the number of dependent variables b. the number of independent variables c. the number of equations d. detrimental situations Answer: B Answer: B Answer: B As the number of degrees of freedom for a t distribution increases, the difference between the t distribution and the standard normal distribution a.
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CAL 364
An auto manufacturer wants to estimate the annual income of owners of a particular model of automobile. A random sample of 200 current owners is taken. The population standard deviation is known. Which Excel function would not be appropriate to use to construct a confidence interval estimate? a. NORM.S.INV b. COUNTIF c. AVERAGE d.
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CAL 376
51. Which of the following observed on a control chart suggests a process that is not in control? a. Points follow a smooth pattern from the lower control limit to the upper control limit b. The number of points above and below the center line is about the same c. Points fall randomly
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CAL 393 Quiz
In simple linear regression analysis, which of the following is not true? a. The F test and the t test yield the same results. b. The F test and the t test may or may not yield the same results. c. The relationship between x and y is represented by means of a
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CAL 394
Exhibit 14-3 Regression analysis was applied between sales data (in $1,000s) and advertising data (in $100s) and the following information was obtained. Refer to Exhibit 14-3. Based on the above estimated regression equation, if advertising is $3,000, then the point estimate for sales (in dollars) is a. $66,000 b. $5,412 c. $66 d. $17,400 Answer: A Answer: A Answer:
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CAL 398 Test
What value of Durbin-Watson statistic indicates no autocorrelation is present? a. 1 b. 2 c. -2 d. 0 Answer: B Answer: B Answer: B From a population consisting of 8,000 elements, a sample of size 121 is selected. The sample has a mean of 4,000 and a standard deviation of 600. a. Estimate the standard error of the mean. b.
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CAL 403 Quiz 3
In hypothesis testing if the null hypothesis has been rejected when the alternative hypothesis has been true, a. a Type I error has been committed b. a Type II error has been committed c. either a Type I or Type II error has been committed d. the correct decision has been made Answer: D Answer: D Answer:
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CAL 442 Test
Exhibit 20-5 Below you are given a payoff table involving three states of nature and three decision alternatives. The probability of occurrence of S1 is 0.2 and the probability of occurrence of S2 is 0.3. Refer to Exhibit 20-5. The expected value of the best alternative is a. 5.0 b. 6.5 c. 7.5 d. 9.0 Answer: B Answer: B Answer:
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CAL 471 Quiz
If a data set has SST 2,000 and SSE 800, then the coefficient of determination is a. 0.4 b. 0.6 c. 0.5 d. 0.8 Answer: B Answer: B Answer: B The number of customers at Winkies Donuts between 8:00a.m. and 9:00a.m. is believed to follow a Poisson distribution with a mean of 2 customers per minute. a. During a randomly
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CAL 473 Test 1
Below you are given a partial Excel output based on a sample of 30 days of the price of a company's stock (y in dollars), the Dow Jones industrial average (x1), and the stock price of the company's major competitor (x2 in dollars). a. Use the output shown above and write
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CAL 475 Quiz 3
Accepting a good-quality lot would be a a. Type I error b. Type II error c. correct decision d. None of the other answers is correct. Answer: C Answer: C Answer: C The skewness measure for the exponential distributions is a. 0 b. 1 c. 2 d. 3 Answer: C Answer: C Answer: C A recent Time magazine reported the following information about a sample of
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CAL 483
It is known that the population variance equals 484. With a 0.95 probability, the sample size that needs to be taken to estimate the population mean if the desired margin of error is 5 or less is a. 25 b. 74 c. 189 d. 75 Answer: D Answer: D Answer: D When ranking combined data in a Wilcoxon signed
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CAL 488
If the calculated lower-control limit of a p chart is negative, a. a mistake has been made in the calculations b. use the absolute value of the lower limit c. it is set to zero d. None of the other answers is correct. Answer: C Answer: C Answer: C Exhibit 20-4 Below you are given a payoff table involving
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CAL 512 Test
A standard normal distribution is a normal distribution with a. a mean of 1 and a standard deviation of 0 b. a mean of 0 and a standard deviation of 1 c. any mean and a standard deviation of 1 d. any mean and any standard deviation Answer: B Answer: B Answer: B Exhibit 10-13 In order to determine
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CAL 562
Exhibit 11-1 Last year, the standard deviation of the ages of the students at UA was 1.81 years. Recently, a sample of 10 students had a standard deviation of 2.1 years. We are interested in testing to see if there has been a significant change in the standard deviation of the
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CAL 588 Quiz
The standard deviation of is referred to as the a. standard x b. standard error of the mean c. sample standard mean d. sample mean deviation Answer: B Answer: B Answer: B Exhibit 10-1 Salary information regarding male and female employees of a large company is shown below. Refer to Exhibit 10-1. The point estimate of the difference between
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CAL 588 Quiz 2
Exhibit 13-1 Refer to Exhibit 13-1. The null hypothesis is to be tested at the 5% level of significance. The critical value from the table is a. 2.87 b. 3.24 c. 4.08 d. 8.7 Answer: B Answer: B Answer: B The measure of variability easiest to compute, but seldom used as the only measure, is the a. range b. interquartile range c. standard
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CAL 615 Midterm 2
Shown below is a portion of a computer output for a regression analysis relating Y (dependent variable) and X (independent variable). a. Perform a t test using the p-value approach and determine whether or not Y and X are related. Let = 0.05. b. Using the p-value approach, perform an F test and
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CAL 623 Quiz 1
Exhibit 6-4 The starting salaries of individuals with an MBA degree are normally distributed with a mean of $40,000 and a standard deviation of $5,000. Refer to Exhibit 6-4. What is the probability that a randomly selected individual with an MBA degree will get a starting salary of at least $47,500? a. 0.4332 b. 0.9332 c.
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CAL 643 Final
Exhibit 10-10 The results of a recent poll on the preference of shoppers regarding two products are shown below. Refer to Exhibit 10-10. The standard error of is a. 52 b. 0.044 c. 0.0225 d. 100 Answer: C Answer: C Answer: C It is crucial that the variance of a production process be less than or equal to 25. A
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CAL 656 Quiz 1
In a completely randomized experimental design, 11 experimental units were used for each of the 3 treatments. Part of the ANOVA table is shown below. Answer: a. Answer: a. Answer: a. Exhibit 11-4 Refer to Exhibit 11-4. The test statistic for this problem equals a. 23.2 b. 24 c. 36.25 d. 37.5 Answer: C Answer: C Answer: C If the margin of error
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CAL 658 Test 2
Exhibit 15-7 A regression model involving 4 independent variables and a sample of 15 periods resulted in the following sum of squares. SSR = 165 SSE = 60 Refer to Exhibit 15-7. The test statistic from the information provided is a. 2.110 b. 3.480 c. 4.710 d. 6.875 Answer: D Answer: D Answer: D Which of the following variables use the interval
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CAL 662 Midterm
A uniform probability distribution is a continuous probability distribution where the probability that the random variable assumes a value in any interval of equal length is a. different for each interval b. the same for each interval c. Either a or b could be correct depending on the magnitude of the standard deviation. d.
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CAL 664
The probability of the states of nature, after use of Bayes' theorem to adjust the prior probabilities based upon given indicator information, is called a. marginal probability b. conditional probability c. posterior probability d. None of the answers are correct. Answer: B Answer: B Answer: B Through a telephone survey, a low-interest bank credit card is offered to
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CAL 675 Quiz 3
Exhibit 18-6 It is believed that the median yearly income in a suburb of Atlanta is $70,000. A sample of 67 residents was taken. Thirty-eight had yearly incomes above $70,000, 26 had yearly incomes below $70,000, and 3 had yearly incomes equal to $70,000. The null hypothesis to be tested is
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CAL 676 Midterm 2
Z is a standard normal random variable. The P(1.05 z 2.13) equals a. 0.8365 b. 0.1303 c. 0.4834 d. None of the alternative answers is correct. Answer: B Answer: B Answer: B A population has a mean of 80 and a standard deviation of 7. A sample of 49 observations will be taken. The probability that the
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CAL 736
Exhibit 13-6 Part of an ANOVA table is shown below. Refer to Exhibit 13-6. The conclusion of the test is that the means a. are equal b. may be equal c. are not equal d. None of these alternatives is correct. Answer: C Answer: C Answer: C Exhibit 16-1 In a regression analysis involving 25 observations, the following estimated regression equation
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CAL 748
Consider the following data. Use Excel's Regression Tool to estimate a general linear model that uses a reciprocal transformation on the dependent variable. Answer: Answer: Answer: Exhibit 18-4 It has been hypothesized that there is no difference in the mathematical accuracy of men and women. A sample of men and women were given math
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CAL 752 Quiz 2
Exhibit 5-3 The probability distribution for the number of goals the Lions soccer team makes per game is given below. Refer to Exhibit 5-3. What is the probability that in a given game the Lions will score at least 1 goal? a. 0.20 b. 0.55 c. 1.0 d. 0.95 Answer: D Answer: D Answer: D The sales volumes of CMM, Inc.,
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CAL 764 Test 2
Exhibit 18-4 It has been hypothesized that there is no difference in the mathematical accuracy of men and women. A sample of men and women were given math tests. The scores on the tests are given below. Refer to Exhibit 18-4. Calculate a Spearman rank-correlation coefficient for 20 pairs of data when di 2
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CAL 775 Midterm 1
The following data represent the number of flash drives sold per day at a local computer shop and their prices. Answer: Answer: Answer: All the data collected in a particular study are referred to as the a. census b. inference c. variable d. data set Answer: Answer: Answer: D D D The required condition for using an ANOVA procedure on
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CAL 812 Quiz
The grades of a sample of 5 students, selected from a large population, are given below. a. Determine a point estimate for the variance of the population. b. Determine a 95% confidence interval for the variance of the population. c. At 90% confidence, test to determine if the variance of the population is
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Chapter 10 These Employees Have Gone Through Training Session Both
17. During the primary elections of 2004, candidate A showed the following pre-election voter support in Tennessee and Mississippi. Voters Surveyed Voters Favoring Candidate A Tennessee 500 295 Mississippi 700 357 a. Develop a 95% confidence interval estimate for the difference between the proportion of
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Chapter 10 Variance Of The Sampling Distribution Of
CHAPTER 10INFERENCE ABOUT MEANS AND PROPORTIONS WITH TWO POPULATIONS MULTIPLE CHOICE 1. If we are interested in testing whether the proportion of items in population 1 is larger than the proportion of items in population 2, the a. null hypothesis should state P1 - P2 < 0
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Chapter 11 Refer Exhibit 115 The Test Statistic For
CHAPTER 11INFERENCES ABOUT POPULATION VARIANCES MULTIPLE CHOICE 1. A sample of 28 elements is selected to estimate a 95% confidence interval for the variance of the population. The chi-square values to be used for this interval estimation are a. -1.96 and 1.96 b. 14.573 and 43.195 c.
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Chapter 11 The Grades Sample Students Selected From
6.34 to 10.74 (rounded) PTS: 1 6.34 to 10.74 (rounded) PTS: 1 6.34 to 10.74 (rounded) PTS: 1 7. A lumber company has claimed that the standard deviation for the lengths of their 6 foot boards is 0.5 inches or less. To test their claim, a random
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Chapter 12 Five Hundred Randomly Selected Automobile Owners Were Questioned
12. Shown below is a 2 3 contingency table with observed values from a sample of 500. At 95% confidence, test for independence of the row and column factors. Column Factor Row Factor x y Z A 40 50 110 B 60 100 140
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Chapter 12 Poisson Distribution Goodness Fit Test Normal Distribution
CHAPTER 12TESTS OF GOODNESS OF FIT, INDEPENDENCE AND MULTIPLE PROPORTIONS MULTIPLE CHOICE 1. A population where each element of the population is assigned to one and only one of several classes or categories is a a. multinomial population b. Poisson population c. normal population d. None of
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Chapter 13 A Dietician Wants To See If There Is Any Difference
Within Treatments (Error) 40.00 12 3.33 Total b. Since the test statistic F = 3.26 < 3.89 do not reject Ho, cannot conclude that there is a significant difference in the means of the three populations PTS: 1 Total b. Since the test statistic F = 3.26 <
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Chapter 13 Anova Procedure Used For Data
CHAPTER 13EXPERIMENTAL DESIGN AND ANALYSIS OF VARIANCE MULTIPLE CHOICE 1. In an analysis of variance problem if SST = 120 and SSTR = 80, then SSE is a. 200 b. 40 c. 80 d. 120 ANS: B PTS: 1 ANS: B PTS: 1 ANS: B
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Chapter 13 The Three Major Automobile Manufacturers Have Entered
20 22 18 12 12 14 20 16 17 18 12 14 a. State the null and alternative hypotheses. b. Calculate the test statistic. c. What would you advise the dietician about the effectiveness of the three diets? Use a .05 level of significance. ANS: a. H0:
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Chapter 15 The Numerical Value Of The Coefficient Of Determination
CHAPTER 15MULTIPLE REGRESSION MULTIPLE CHOICE 1. If a qualitative variable has k levels, the number of dummy variables required is a. k 1 b. k c. k + 1 d. 2k ANS: A PTS: 1 ANS: A PTS: 1 ANS: A PTS: 1
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Chapter 16 Refer Exhibit 164 From The Above Function
CHAPTER 16REGRESSION ANALYSIS: MODEL BUILDING MULTIPLE CHOICE 1. In multiple regression analysis, the general linear model a. cannot be used to accommodate curvilinear relationships between dependent variables and independent variables b. can be used to accommodate curvilinear relationships between the independent variables and dependent variable c. must
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Chapter 16 Soft Drink Manufacturer Has Developed Regression
9. A regression model relating a dependent variable, y, with one independent variable, x1, resulted in an SSE of 400. Another regression model with the same dependent variable, y, and two independent variables, x1 and x2, resulted in an SSE of 320. At = .05, determine if x2 contributed
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Chapter 17 Below You Are Given The Seasonal
b. Trend = 174 + 4 t = 174 +4 (13) = 226 Forecast = Trend*(SI for Quarter 1) = (226)*(0.9) = 203.40 PTS: 1 b. Trend = 174 + 4 t = 174 +4 (13) = 226 Forecast = Trend*(SI for Quarter 1) = (226)*(0.9) = 203.40 PTS: 1
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Chapter 17 The Estimate Of The Seasonal Component Is 94%
Chapter 17 - Time Series Analysis and Forecasting MULTIPLE CHOICE 1. Common types of data patterns that can be identified when examining a time series plot include all of the following except a. horizontal b. vertical c. seasonal d. cyclical ANS: B PTS: 1 ANS:
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Chapter 18 Exhibit 185 The Null Hypothesis Should Bea
CHAPTER 18NONPARAMETRIC METHODS MULTIPLE CHOICE 1. Statistical methods that generally require very few, if any, assumptions about the population distribution are known as a. parametric b. nonparametric c. free methods d. None of these alternatives is correct. ANS: B PTS: 1 ANS: B PTS: 1
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Chapter 18 Three Universities In Your State Have Decided
b. Reject the null hypothesis since z = 2.94. PTS: 1 b. Reject the null hypothesis since z = 2.94. PTS: 1 b. Reject the null hypothesis since z = 2.94. PTS: 1 15. It is believed that the median age of college students is 21
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Chapter 19 None The Other Answers Correctans Cpts 132
CHAPTER 19STATISTICAL METHODS FOR QUALITY CONTROL MULTIPLE CHOICE 1. Control charts that are based on data indicating the presence of a defect or the number of defects are called ______ control charts. a. attributes b. variables c. common-cause d. assignable-cause ANS: A PTS: 1 ANS:
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Chapter 2 Excels Can Used Construct
CHAPTER 2DESCRIPTIVE STATISTICS: TABULAR AND GRAPHICAL DISPLAYS MULTIPLE CHOICE 1. The minimum number of variables represented in a bar chart is a. 1 b. 2 c. 3 d. 4 ANS: A PTS: 1 ANS: A PTS: 1 ANS: A PTS: 1 2. The
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Chapter 2 For The Following Observations Plot Scatter Diagram
ANS: 0.080 PTS: 1 ANS: 0.080 PTS: 1 ANS: 0.080 PTS: 1 10. Fill in the missing value for the following percent frequency distribution. Annual Salaries Percent Frequency Under $30,000 10 $30,000 49,999 35 $50,000 69,999 40 $70,000
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Chapter 20 Compute The Expected Value Of Perfect Information
Expensive 20,000 -5,000 Medium 10,000 2,000 Inexpensive 5,000 11,000 a. Determine the expected value of each alternative and indicate which decision alternative is the best. b. Determine the expected value with perfect information about the states of nature. c. Determine the expected value of perfect information.
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Chapter 20 Refer Exhibit 205 The Expected Value The
CHAPTER 20DECISION ANALYSIS MULTIPLE CHOICE 1. A tabular representation of the payoffs for a decision problem is a a. decision tree b. payoff table c. matrix d. sequential matrix ANS: B PTS: 1 ANS: B PTS: 1 ANS: B PTS: 1 2. The
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Chapter 21 Any Method Of Sampling For Which The Probability Of Selecting
Chapter 21 - Sample Survey MULTIPLE CHOICE 1. The target population and the sampled population a. are always the same b. are not always the same c. must be the same for the results to be accurate d. None of these alternatives is correct. ANS: B PTS:
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Chapter 3 Since The Covariance Negative Indicates Negative Relationship Between
a. 0 b. .5 c. 1 d. None of the other answers is correct. ANS: A PTS: 1 ANS: A PTS: 1 ANS: A PTS: 1 100. For data skewed to the left, the skewness is a. between 0 and .5 b. less than 1 c.
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Chapter 4 Company And Company The Probability Getting An Offer
11. Assume two events A and B are mutually exclusive and, furthermore, P(A) = 0.2 and P(B) = 0.4. a. Find P(A B). b. Find P(A B). c. Find P(AB). ANS: a. 0.0 b. 0.6 c. 0.0 PTS: 1 ANS: a. 0.0 b. 0.6 c. 0.0
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Chapter 4 Each Urn Contains Chips Numbered From 0 To 9
CHAPTER 4INTRODUCTION TO PROBABILITY MULTIPLE CHOICE 1. The probability of at least one head in two flips of a coin is a. 0.33 b. 0.50 c. 0.75 d. 1.00 ANS: C PTS: 1 ANS: C PTS: 1 ANS: C PTS: 1 2. Revised
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Chapter 5 Define The Random Variable Words For This
101. Bivariate probabilities are often called a. union probabilities b. conditional probabilities c. marginal probabilities d. joint probabilities ANS: D PTS: 1 ANS: D PTS: 1 ANS: D PTS: 1 102. In order to compute a binomial probability we must know all of the
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Chapter 6 What Percentage All Bottles Produced Contains More
ANS: B PTS: 1 ANS: B PTS: 1 ANS: B PTS: 1 98. A property of the exponential distribution is that the mean equals the a. mode b. median c. variance d. standard deviation ANS: D PTS: 1 ANS: D PTS: 1 ANS: D PTS:
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Chapter 7 Sample New Models Automobiles Provides The Following
Exhibit 7-5 Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. 89. Refer to Exhibit 7-5. The mean and the standard deviation of the sampling distribution of the sample means are a.
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Chapter 7 The Distribution The Population Unknown The Mean
CHAPTER 7SAMPLING AND SAMPLING DISTRIBUTIONS MULTIPLE CHOICE 1. The expected value of equals the mean of the population from which the sample is drawn a. only if the sample size is 30 or greater b. only if the sample size is 50 or greater c. only if
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Chapter 8 As The Level Of Confidence Increases, The Confidence Interval Gets
16. A random sample of 36 magazine subscribers is taken to estimate the mean age of all subscribers. The data follow. Use Excel to construct a 90% confidence interval estimate of the mean age of all of this magazine's subscribers. Subscriber Age Subscriber Age Subscriber Age 1 39
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Chapter 9 Therefore, Reject H0, There Is Sufficient Evidence At
a. H0: 3 Ha: 3 b. z = 4; therefore, reject H0, there is sufficient evidence at = .05 to conclude that there has been an increase in the average price c. Less than .001 PTS: 1 a. H0: 3 Ha: 3 b. z = 4; therefore, reject
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MATH 123 Midterm 2
A numerical measure, such as a mean, computed from a population is known as a a. population parameter b. sample parameter c. sample statistic d. sample mean Answer: A Answer: A Answer: A A company attempts to evaluate the potential for a new bonus plan by selecting a sample of 4 salespersons to use the bonus plan for
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MATH 147
41. Exhibit 12-6 The following shows the number of individuals in a sample of 300 who indicated they support the new tax proposal. We are interested in determining whether or not the opinions of the individuals of the three groups are uniformly distributed. Refer to Exhibit 12-6. The number of degrees of
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MATH 180
Exhibit 18-2 Students in statistics classes were asked whether they preferred a 10-minute break or to get out of class 10 minutes early. In a sample of 150 students, 40 preferred a 10-minute break, 80 preferred to get out 10 minutes early, and 30 had no preference. We want to determine
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MATH 181 Quiz 2
It is known that the variance of a population equals 1,936. A random sample of 121 has been taken from the population. There is a .95 probability that the sample mean will provide a margin of error of a. 7.84 or less b. 31.36 or less c. 344.96 or less d. 1,936 or less Answer:
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MATH 231 Test 1
A regression model involving 8 independent variables for a sample of 69 periods resulted in the following sum of squares. SSE = 306 SST = 1800 Answer: Answer: Answer: The 75th percentile is also the a. first quartile b. second quartile c. third quartile d. fourth quartile Answer: C Answer: C Answer: C Which of the following is(are) required condition(s) for
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MATH 265
Exhibit 3-2 A researcher has collected the following sample data. The mean of the sample is 5. Refer to Exhibit 3-2. The standard deviation is a. 8.944 b. 4.062 c. 13.2 d. 16.5 Answer: BAnswer: Answer: BAnswer: Answer: B Answer: An issue of Fortune Magazine reported that the following companies had the lowest sales per employee among the
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MATH 277 Test 1
Prior probabilities are the probabilities of the states of nature a. after obtaining sample information b. prior to obtaining of perfect information c. prior to obtaining sample information d. after obtaining perfect information Answer: C Answer: C Answer: C You are given the following results from a sample of 5 observations. a. Construct a 99% confidence interval for the
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MATH 279 Quiz 3
If the assumption can be made that the populations all have the same shape, the Kruskal-Wallis test becomes a. a test of the skewness of the k populations b. a test of the variances of the k populations c. a test of the medians of the k populations d. a test of the means
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MATH 280 Quiz
A sample of 5 clusters is to be taken from a population with N = 30 clusters and M = 420 clusters in the population. The values of Mi and ai are shown below. Answer: Answer: Answer: Exhibit 5-8 The student body of a large university consists of 60% female students. A
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MATH 311
A Type II error is committed when a. a true alternative hypothesis is mistakenly rejected b. a true null hypothesis is mistakenly rejected c. the sample size has been too small d. not enough information has been available Answer: A Answer: A Answer: A If a qualitative variable has k levels, the number of dummy variables required is a.
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Exam Prep
MATH 314 Final
The mean of a sample is a. always equal to the mean of the population b. always smaller than the mean of the population c. computed by summing the data values and dividing the sum by (n 1) d. computed by summing all the data values and dividing the sum by the number of
Modern Business Statistics with Microsoft Excel 5th Edition
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Exam Prep
MATH 321
The chi-square values (for interval estimation) for a sample size of 10 at 95% confidence are a. 3.32511 and 16.9190 b. 2.70039 and 19.0228 c. 4.16816 and 14.6837 d. 3.24697 and 20.4831 Answer: B Answer: B Answer: B Exhibit 15-6 Below you are given a partial Excel output based on a sample of 16 observations. Refer to Exhibit 15-6. The
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MATH 338
In the analysis of variance procedure (ANOVA), factor refers to a. the dependent variable b. the independent variable c. different levels of a treatment d. the critical value of F Answer: B Answer: B Answer: B Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. What
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Exam Prep
MATH 342 Homework
Exhibit 10-5 The following information was obtained from matched samples. Refer to Exhibit 10-5. The 95% confidence interval for the difference between the two population means is a. -3.776 to 1.776 b. -2.776 to 2.776 c. -1.776 to 2.776 d. 0 to 3.776 Answer: A Answer: A Answer: A The sample space refers to a. any particular experimental outcome b. the sample
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Exam Prep
MATH 369 Test
Excel's POISSON.DIST function has how many inputs? a. 2 b. 3 c. 4 d. 5 Answer: B Answer: B Answer: B Given below are seven observations collected in a regression study on two variables, x (independent variable) and y (dependent variable). a. Develop the least squares estimated regression equation. b. At 95% confidence, perform a t test and determine whether
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Exam Prep
MATH 387 Quiz 3
When dealing with the problem of non-constant variance, the reciprocal transformation means using a. 1/x as the independent variable instead of x b. x2 as the independent variable instead of x c. y2 as the dependent variable instead of y d. 1/y as the dependent variable instead of y Answer: D Answer: D Answer: D Part of an
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MATH 423 Quiz 1
The manager of University Credit Union (UCU) is concerned about checking account transaction discrepancies. Customers are bringing transaction errors to the attention of the bank's staff several months after they occur. The manager would like to know what proportion of his customers balance their checking accounts within 30 days of
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Exam Prep
MATH 426
A real estate agency conducts a study to determine if the median selling price of homes in a particular neighborhood has changed since last year. Last year the median selling price was $188,500. The agency randomly selects 20 recently sold homes in that particular neighborhood and finds that 14 of
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MATH 429 Quiz
A multiple regression model has a. only one independent variable b. more than one dependent variable c. more than one independent variable d. at least 2 dependent variables Answer: C Answer: C Answer: C When the conclusions based upon the aggregated crosstabulation can be completely reversed if we look at the unaggregated data, the occurrence is known as a.
Modern Business Statistics with Microsoft Excel 5th Edition
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Exam Prep
MATH 457 Quiz
A random sample of nine telephone calls in an office provided the following information. a. Determine the point estimate for the average duration of all calls. b. What is the point estimate for the standard deviation of the population? c. What is the point estimate for the proportion of all calls that were
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Exam Prep
MATH 461
You are given the following payoff table: Assume the following probability information is given: a. Find the values of P(I1) and P(I2). b. Determine the values of P(S1 | I1), P(S2 | I1), P(S1 | I2), and P(S2 | I2). c. Use the decision tree approach and determine the optimal strategy. What is the
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Exam Prep
MATH 464
The number observations in a complete data set having 10 elements and 5 variables is a. 5 b. 10 c. 25 d. 50 Answer: B Answer: B Answer: B A binomial probability distribution with p = .3 is a. negatively skewed b. symmetrical c. positively skewed d. bimodal Answer: A Answer: A Answer: A Which of the following symbols represents the size of the population? a. 2
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MATH 478 Midterm 1
Exhibit 15-2 A regression model between sales (y in $1,000), unit price (x1 in dollars) and television advertisement (x2 in dollars) resulted in the following function: = 7 - 3x1 + 5x2 For this model SSR = 3500, SSE = 1500, and the sample size is 18. Refer to Exhibit 15-2. The
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MATH 492
Regression analysis was applied between sales (in $1,000) and advertising (in $100), and the following regression function was obtained. 80 6.2x Based on the above estimated regression line, if advertising is $10,000, then the point estimate for sales (in dollars) is a. $62,080 b. $142,000 c. $700 d. $700,000 Answer: D Answer: D Answer: D Whenever the probability
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Exam Prep
MATH 518
A sample of 21 elements is selected to estimate a 90% confidence interval for the variance of the population. The chi-square value(s) to be used for this interval estimation is (are) a. -1.96 and 1.96 b. 12.443 c. 10.851 and 31.410 d. 12.443 and 28.412 Answer: D Answer: D Answer: D A market study taken at a local
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MATH 518 Midterm 1
In determining an interval estimate of a population mean when is unknown, we use a t distribution with a. degrees of freedom b. degrees of freedom c. n 1 degrees of freedom d. n degrees of freedom Answer: C Answer: C Answer: C Read the t statistic from the table of t distributions and circle the
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Exam Prep
MATH 525
Exhibit 20-1 Below you are given a payoff table involving two states of nature and three decision alternatives. The probability of occurrence of S1 = 0.2. Refer to Exhibit 20-1. The expected value of perfect information is a. 6.2 b. 2.0 c. 13.6 d. 4.8 Answer: B Answer: B Answer: B If P(A|B) = .3, a. P(B|A) = .7 b. P(AC|B) = .7 c.
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Exam Prep
MATH 528
Consider the following results for two samples randomly taken from two populations. a. What are the degrees of freedom for the t distribution? b. At 95% confidence, compute the margin of error. c. Develop a 95% confidence interval for the difference between the two population means. Answer: a. 60b. 3.026c. 2.974 to 9.026 Answer: a.
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Exam Prep
MATH 531 Quiz 2
A simple random sample of size n from a finite population of size N is a sample selected such that each possible sample of size a. N has the same probability of being selected b. n has a probability of 0.5 of being selected c. n has a probability of 0.1 of being
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Exam Prep
MATH 534 Midterm 2
Exhibit 10-1 Salary information regarding male and female employees of a large company is shown below. Refer to Exhibit 10-1. If you are interested in testing whether or not the average salary of males is significantly greater than that of females, the test statistic is a. 2.0 b. 1.5 c. 1.96 d. 1.645 Answer: B Answer: B Answer: B There
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Exam Prep
MATH 537
DFSS stands for a. Defects Found Sifting and Sorting b. Design For Six Sigma c. Deviation From Specifications and Standards d. Defer For Statistical Study Answer: B Answer: B Answer: B .9752 = 8.9066 indicates that a. 97.5% of the chi-square values are greater than 8.9066. b. 97.5% of the chi-square values are less than 8.9066. c. 2.5% of the
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Exam Prep
MATH 547 Test 2
In statistical experiments, each time the experiment is repeated a. the same outcome must occur b. the same outcome cannot occur again c. a different outcome may occur d. None of the other answers is correct. Answer: C Answer: C Answer: C The value of F0.01 with 9 numerator and 20 denominator degrees of freedom is a. 2.39 b. 2.94 c.
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Exam Prep
MATH 561 Quiz 3
The critical F value with 6 numerator and 60 denominator degrees of freedom at = . 05 is a. 3.74 b. 2.25 c. 2.37 d. 1.96 Answer: B Answer: B Answer: B The population being studied is usually considered ______ if it involves an ongoing process that makes listing or counting every element in the population impossible. a. finite b. infinite c.
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Exam Prep
MATH 564 Homework
A meteorologist stated that the average temperature during July in Chattanooga was 80 degrees. A sample of 32 Julys was taken. The correct set of hypotheses is a. H0: 80 Ha: 80 b. H0: 80 Ha: > 80 c. H0: 80 Ha: 80 d. None of the other answers are correct. Answer: D Answer: D Answer: D Exhibit
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MATH 578 Quiz 2
The probability distribution of all possible values of the sample proportion is the a. probability density function of b. sampling distribution of c. same as , since it considers all possible values of the sample proportion d. sampling distribution of Answer: D Answer: D Answer: D Probabilistic sampling is any method of sampling in which a.
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Exam Prep
MATH 602
The salespeople at Gold Key Realty sell up to 9 houses per month. The probability distribution of a salesperson selling x houses in a month is as follows: a. What are the mean and standard deviation for the number of houses sold by a salesperson per month? b. Any salesperson selling more
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Exam Prep
MATH 604 Quiz
If two events are mutually exclusive, then the probability of their intersection a. will be equal to zero b. can have any value larger than zero c. must be larger than zero, but less than one d. will be one Answer: A Answer: A Answer: A In Excel, which of the following functions is used to conduct a
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Exam Prep
MATH 667 Test
A control chart that is used to monitor the range of the measurements in a sample is a. a p chart b. an x-bar chart c. an R chart d. an np chart Answer: C Answer: C Answer: C The sample result plotted on an np control chart is a. np b. np c. the number of perfect units
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Exam Prep
MATH 680 Test 2
A population has a mean of 53 and a standard deviation of 21. A sample of 49 observations will be taken. The probability that the sample mean will be greater than 57.95 is a. 0 b. .0495 c. .4505 d. None of the alternative answers is correct. Answer: B Answer: B Answer: B A sequence of decisions and
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Exam Prep
MATH 691
A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is a. 70.02 to 81.98 b. 69.82 to 82.18 c. 70.06 to 81.94 d. 69.48 to
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Exam Prep
MATH 692
An intersection or junction point of a decision tree is called a (n) a. junction b. intersection c. intersection point d. node Answer: D Answer: D Answer: D A movie based on a best-selling novel was recently released. Six hundred viewers of the movie, 235 of whom had previously read the novel, were asked to rate the quality of
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MATH 699 Midterm 2
When should measures of location and dispersion be computed from grouped data rather than from individual data values? a. as much as possible since computations are easier b. only when individual data values are unavailable c. whenever computer packages for descriptive statistics are unavailable d. only when the data are from a population Answer: B Answer:
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Exam Prep
MATH 739 Midterm 1
Exhibit 10-3 A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the
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Exam Prep
MATH 760 Final
A regression model relating the yearly income (y), age (x1), and the gender of the faculty member of a university (x2 = 1 if female and 0 if male) resulted in the following information. = 5,000 + 1.2x1 + 0.9x2 n = 20 SSE = 500 SSR = 1,500 Sb1 = 0.2
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Exam Prep
MATH 776 Quiz 3
If a penny is tossed four times and comes up heads all four times, the probability of heads on the fifth trial is a. zero b. 1/32 c. 0.5 d. larger than the probability of tails Answer: C Answer: C Answer: C Sixty percent of the student body at UTC is from the state of Tennessee (T), 30%
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Exam Prep
MATH 778 Midterm
For the standard normal distribution, determine the probability of obtaining a z value a. greater than zero. b. between -2.34 to -2.55 c. less than 1.86. d. between -1.95 to 2.7. e. between 1.5 to 2.75. Answer: a. 0.5000b. 0.0042c. 0.9686d. 0.9709e. 0.0638 Answer: a. 0.5000b. 0.0042c. 0.9686d. 0.9709e. 0.0638 Answer: a. 0.5000 b. 0.0042 c. 0.9686 d. 0.9709 e. 0.0638 46. Exhibit
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Exam Prep
MATH 780 Midterm 1
The number of haircuts performed each day at KwikKuts in the last four weeks is listed below. a. Plot the sales data. Do you see both trend and seasonality components in the data? b. Forecast the number of haircuts to be performed in each workday of week 6. Answer: a. There are both
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Exam Prep
MATH 792 Quiz
The manager of University Credit Union (UCU) is concerned about checking account transaction discrepancies. Customers are bringing transaction errors to the attention of the bank's staff several months after they occur. The manager would like to know what proportion of his customers balance their checking accounts within 30 days of
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Exam Prep
MATH 798 Homework
Exhibit 10-11 An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below. We are interested in determining if the accident proportions differ between the two age groups. Refer to Exhibit 10-11.
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MATH 817
Exhibit 9-3 Refer to Exhibit 9-3. The p-value is equal to a. 0.1151 b. 0.3849 c. 0.2698 d. 0.2302 Answer: D Answer: D Answer: D Twenty-five percent of all resumes received by a corporation for a management position are from females. Fifteen resumes will be received tomorrow. a. Define the random variable in words for this experiment. b. What is the probability
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Exam Prep
MATH 820 Midterm
A professor at a local university noted that the grades of her students were normally distributed with a mean of 78 and a standard deviation of 10. a. The professor has informed us that 16.6% of her students received grades of A. What is the minimum score needed to receive a
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Exam Prep
MATH 854
Exhibit 12-3 In order to determine whether or not a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pills. The results of the study are shown below. We are interested in determining whether or not the medication was
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MATH 895 Test 1
Exhibit 14-5 You are given the following information about y and x. Refer to Exhibit 14-5. The least squares estimate of b0 (intercept) equals a. 1 b. -1 c. 6 d. 5 Answer: C Answer: C Answer: C A survey of a sample of business students resulted in the following information regarding the genders of the individuals and their major. a.
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Exam Prep
MATH Excel’s Can Be Used To Construct A Crosstabulation
The life expectancy of Timely brand watches is normally distributed with a mean of four years and a standard deviation of eight months. a. What is the probability that a randomly selected watch will be in working condition for more than five years? b. The company has a three-year warranty period on
Modern Business Statistics with Microsoft Excel 5th Edition

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