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Refer to the following breakdown of responses to a survey of "Are you concerned about
being tracked while connected to the Internet?"
What type of chart should be used to show relative class frequencies?
A. A pie chart
B. A bar chart
C. A histogram
D. A frequency polygon
A data set has six values: 10, 12, 21, 26, 26, and 26. What ranks would be assigned to
26?
A. 4, 5, 6
B. 4, 4, 4
C. 5, 5, 5
D. 5.5, 5.5, 5.5
In a control chart, expected variation is defined by the:
A. standard deviation.
B. standard error of the distribution.
C. upper control limits only.
D. upper and lower control limits.
The Investment Research Institute reported in its Mutual Fund Fact Book that the
number of mutual funds increased from 5725 in 1999 to 7977 in 2009. What is the
geometric mean annual percent increase in the number of funds?
A. 1.034
B. 3.37
C. 39.34
D. 71.11
E. 633.5
An investigation of the effectiveness of a training program to improve customer
relationships included a pre-training and post-training customer survey. To compare the
differences they computed (post-training survey score - pre-training survey score).
Seven customers were randomly selected and completed both surveys. The results
follow.
What is the value of the test statistic?
A. 1.943
B. 1.895
C. 2.542
D. 2.447
The Office of Student Services at a large western state university maintains information
on the study habits of its full-time students. Their studies indicate that the mean amount
of time undergraduate students study per week is 20 hours. The hours studied follows
the normal distribution with a standard deviation of six hours. Suppose we select a
random sample of 144 current students. What is the probability that the mean of this
sample is between 19 hours and 20 hours?
A. 2.00
B. 0.4772
C. -2.00
D. Cannot be calculated based on the given information.
What is the alternate hypothesis to test the significance of the slope in a regression
equation?
A. H1: β = 0
B. H1: β ≠0
C. H1: β ≤ 0
D. H1: β ≥ 0
What does a coefficient of correlation of 0.70 infer?
A. There is almost no correlation because 0.70 is close to 1.0.
B. 70% of the variation in one variable is explained by the other variable.
C. The coefficient of determination is 0.49.
D. The coefficient of nondetermination is 0.30.
A researcher is studying the effect of 10 different variables on a critical measure of
business performance. A multiple regression analysis including all 10 variables is
performed. What criterion could be used to eliminate 1 of the 10 variables?
A. Multiple R2
B. Largest p-value
C. Smallest p-value
D. Smallest regression coefficient
Suppose we select every fifth invoice in a file. What type of sampling is this?
A. Random
B. Cluster
C. Stratified
D. Systematic
The following table shows the sales for a plastics manufacturer recorded over the past
year. The seasonal indexes for each quarter are also provided. To track the trend for
these four quarters, use the indexes to deseasonalize the sales data.
What is the deseasonalized sales value for quarter 1?
Use the following table to determine whether or not there is a significant difference
between the average hourly wages at two manufacturing companies.
The p-value is ______.
A. 0.036
B. 0.0336
C. 0.4664
D. 2.58
A personnel manager is concerned about absenteeism. She decides to sample employee
records to determine if absenteeism is distributed evenly throughout the six-day
workweek. The null hypothesis is: Absenteeism is distributed evenly throughout the
week. Use the 0.01 level of significance. The sample results are:
How many degrees of freedom are there?
A. 0
B. 3
C. 4
D. 5
A sample standard deviation is the best point estimate of the ___________.
A. population range
B. population skewness
C. population mode
D. population standard deviation
Two accounting professors decided to compare the variance of their grading procedures.
To accomplish this, they each graded the same 10 exams, with the following results:
What is the critical value of F at the 0.01 level of significance?
A. 5.85
B. 5.35
C. 6.51
D. 4.03
The following data was collected on mutual fund prices.
Compute a simple aggregate index comparing mutual fund prices in 2010 to mutual
fund prices in 2000.
Product sales since 2001 are:
The least squares trend equation is given as:
Ŷ = 100 + 28t, where t is set equal to 1 for 2001.
On average, how much did sales change per year from 2001 to 2009?
Two movie reviewers gave their ratings (0 to 4 stars) to ten movies released this past
month as follows:
The rank order correlation is to be used.
What is the critical value using a 0.05 level of significance?
In a multiple regression analysis, the following correlation matrix was computed.
Which independent variables are highly correlated with the dependent variable?
The mean monthly income of a group of college students is $500; the standard
deviation is $50. According to Chebyshev's theorem, at least what percent of the
incomes will lie between $400 and $600?
Product sales since 1999 are:
The least squares trend equation is given as:
Ŷ = 265.12 - 21.18t, where t is set equal to 1 for 1999.
What is the three-year moving average for 1999-2001?
