Archives: Quiz

True or False: TABLE 17-10 Given below are results from the regression analysis where the dependent variable is the number of weeks a worker is unemployed due to a layoff (Unemploy) and the independent variables are the age of the […]

TABLE 11-3 As part of an evaluation program, a sporting goods retailer wanted to compare the downhill coasting speeds of 4 brands of bicycles. She took 3 of each brand and determined their maximum downhill speeds. The results are presented […]

True or False: A sampling distribution is a distribution for a statistic. True or False: Consider a regression in which b2 = -1.5 and the standard error of this coefficient equals 0.3. To determine whether X2 is a significant explanatory […]

True or False: TABLE 17-9 What are the factors that determine the acceleration time (in sec.) from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected: Accel Time: […]

TABLE 8-7 A hotel chain wants to estimate the mean number of rooms rented daily in a given month. The population of rooms rented daily is assumed to be normally distributed for each month with a standard deviation of 240 […]

True or False: TABLE 17-11 A logistic regression model was estimated in order to predict the probability that a randomly chosen university or college would be a private university using information on mean total Scholastic Aptitude Test score (SAT) at […]

True or False: If the amount of gasoline purchased per car at a large service station has a population mean of 15 gallons and a population standard deviation of 4 gallons, and it is assumed that the amount of gasoline […]

TABLE 8-4 The actual voltages of power packs labeled as 12 volts are as follows: 11.77, 11.90, 11.64, 11.84, 12.13, 11.99, and 11.77. True or False: Referring to Table 8-4, it is possible that the 99% confidence interval calculated from […]

True or False: TABLE 17-9 What are the factors that determine the acceleration time (in sec.) from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected: Accel Time: […]

TABLE 15-6 Given below are results from the regression analysis on 40 observations where the dependent variable is the number of weeks a worker is unemployed due to a layoff (Y) and the independent variables are the age of the […]

True or False: A sampling distribution is defined as the probability distribution of possible sample sizes that can be observed from a given population. True or False: For a t distribution with 12 degrees of freedom, the area between -2.6810 […]

TABLE 9-1 Microsoft Excel was used on a set of data involving the number of defective items found in a random sample of 46 cases of light bulbs produced during a morning shift at a plant. A manager wants to […]

True or False: The brand of TV one owns is an example of a numerical variable. True or False: TABLE 17-10 Given below are results from the regression analysis where the dependent variable is the number of weeks a worker […]

True or False: TABLE 17-8 The superintendent of a school district wanted to predict the percentage of students passing a sixth-grade proficiency test. She obtained the data on percentage of students passing the proficiency test (% Passing), daily mean of […]

TABLE 12-11 The director of admissions at a state college is interested in seeing if admissions status (admitted, waiting list, denied admission) at his college is independent of the type of community in which an applicant resides. He takes a […]

True or False: TABLE 17-9 What are the factors that determine the acceleration time (in sec.) from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected: Accel Time: […]

True or False: The amount of alcohol consumed by a person per week is an example of a continuous variable. TABLE 8-6 After an extensive advertising campaign, the manager of a company wants to estimate the proportion of potential customers […]

True or False: The original data values cannot be determined once they are grouped into a frequency distribution table. True or False: TABLE 17-10 Given below are results from the regression analysis where the dependent variable is the number of […]

TABLE 9-7 A major home improvement store conducted its biggest brand recognition campaign in the company’s history. A series of new television advertisements featuring well-known entertainers and sports figures were launched. A key metric for the success of television advertisements […]

True or False: The Z score of a value measures how many standard deviations the value is from the mean. TABLE 8-17 A random sample of 100 stores from a large chain of 500 garden supply stores was selected to […]

TABLE 15-6 Given below are results from the regression analysis on 40 observations where the dependent variable is the number of weeks a worker is unemployed due to a layoff (Y) and the independent variables are the age of the […]

True or False: Suppose = 50 and = 10 for a population. In a sample where n = 100 is randomly taken, 95% of all possible sample means will fall between 48.04 and 51.96. TABLE 9-5 A bank tests the […]

TABLE 8-10 A sales and marketing management magazine conducted a survey on salespeople cheating on their expense reports and other unethical conduct. In the survey on 200 managers, 58% of the managers have caught salespeople cheating on an expense report, […]

True or False: If we use the chi-square method of analysis to test for the difference between proportions, we must assume that there are at least 5 observed frequencies in each cell of the contingency table. True or False: In […]

TABLE 14-7 The department head of the accounting department wanted to see if she could predict the GPA of students using the number of course units (credits) and total SAT scores of each. She takes a sample of students and […]

True or False: TABLE 17-9 What are the factors that determine the acceleration time (in sec.) from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected: Accel Time: […]

True or False: When an explanatory variable is dropped from a multiple regression model, the adjusted r2 can increase. TABLE 11-11 A student team in a business statistics course designed an experiment to investigate whether the brand of bubblegum used […]

True or False: If P(A or B) = 1.0, then A and B must be mutually exclusive. TABLE 8-8 The president of a university would like to estimate the proportion of the student population that owns a personal computer. In […]

True or False: You have just computed a regression model in which the value of coefficient of multiple determination is 0.57. To determine if this indicates that the independent variables explain a significant portion of the variation in the dependent […]

True or False: One of the morals of the red bead experiment is that variation is part of any process. True or False: As the sample size increases, the effect of an extreme value on the sample mean becomes smaller. […]

TABLE 12-5 Four surgical procedures currently are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is called a “clear” operation. A heart center wants to compare the proportion of clear operations […]

True or False: A regression had the following results: SST = 102.55, SSE = 82.04. It can be said that 20.0% of the variation in the dependent variable is explained by the independent variables in the regression. True or False: […]

True or False: The sample mean is an unbiased estimate of the population mean. True or False: You can compute any of the numerical descriptive statistics for the variables of the new worksheet that a drill-down in a PivotTable creates. […]

True or False: The opinions (classified as “for,” “neutral,” or “against”) of a sample of 200 people were broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. You can present this information using […]

TABLE 13-10 The management of a chain electronic store would like to develop a model for predicting the weekly sales (in thousands of dollars) for individual stores based on the number of customers who made purchases. A random sample of […]

True or False: TABLE 17-3 A financial analyst wanted to examine the relationship between salary (in $1,000) and 4 variables: age (X1 = Age), experience in the field (X2 = Exper), number of degrees (X3 = Degrees), and number of […]

True or False: The amount of coffee consumed by an individual in a day is an example of a discrete numerical variable. True or False: A Walmart store in a small town monitors customer complaints and organizes these complaints into […]

TABLE 14-18 A logistic regression model was estimated in order to predict the probability that a randomly chosen university or college would be a private university using information on mean total Scholastic Aptitude Test score (SAT) at the university or […]

True or False: In testing a hypothesis, you should always raise the question concerning the purpose of the study, survey or experiment. True or False: If the values of the seventh and eighth class in a cumulative percentage distribution are […]

True or False: The probability that a standard normal variable, Z, falls between -1.50 and 0.81 is 0.7242. True or False: The coefficient of variation measures variability in a data set relative to the size of the arithmetic mean. Answer: […]

TABLE 8-4 The actual voltages of power packs labeled as 12 volts are as follows: 11.77, 11.90, 11.64, 11.84, 12.13, 11.99, and 11.77. True or False: Referring to Table 8-4, a 95% confidence interval for the mean voltage of the […]

TABLE 15-6 Given below are results from the regression analysis on 40 observations where the dependent variable is the number of weeks a worker is unemployed due to a layoff (Y) and the independent variables are the age of the […]

True or False: TABLE 17-9 What are the factors that determine the acceleration time (in sec.) from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected: Accel Time: […]

True or False: A regression had the following results: SST = 82.55, SSE = 29.85. It can be said that 63.84% of the variation in the dependent variable is explained by the independent variables in the regression. True or False: […]

TABLE 8-12 A random sample of 100 stores from a large chain of 500 garden supply stores was selected to determine the mean number of lawnmowers sold at an end-of-season clearance sale. The sample results indicated a mean of 6 […]

True or False: Holding the sample size fixed, increasing the level of confidence in a confidence interval will necessarily lead to a wider confidence interval. TABLE 8-5 A sample of salary offers (in thousands of dollars) given to management majors […]

TABLE 12-3 The director of transportation of a large company is interested in the usage of her van pool. She considers her routes to be divided into local and non-local. She is particularly interested in learning if there is a […]

One way to innovate with business models is to consider: a. Market research b. A Feasibility analysis c. A Competitive analysis d. An Industry analysis e. A ‘blue ocean strategy’ Because of the benefits that have accrued to new product […]

Anyone investing in a new venture has four principal concerns: rate of growth, return on investment, ____ and ____. a. degree of risk / protection b. cash flow / degree of risk c. founding team / protection d. balance sheet […]

When an entrepreneur decides to use a team effort to create the new venture, he or she generally looks for people who have ____ skills. a. independent b. competing c. complementary d. differentiated e. homogeneous Giving customers something for nothing […]