The following contingency table shows the number of two-bedroom apartments
grouped by monthly rent and location.
The probability that a randomly selected apartment from this group has a monthly rental
from $600 to under $700 and is located in Dover is ________.
A) 0.056
B) 0.105
C) 0.147
D) 0.202
A random sample of 35 business students required an average of 50.7 minutes to
complete a statistics exam. Assume that the population standard deviation to complete
the exam was 10.4 minutes. The 99% confidence interval around this sample mean is
________.
A) (43.7, 57.7)
B) (48.9, 52.5)
C) (48.1, 53.3)
D) (46.2, 55.2)
Consider the partially completed two-way ANOVA summary table.
The degrees of freedom for the interaction of factors A and B for this ANOVA
procedure is _____.
A) 3
B) 4
C) 5
D) 6
When you want to compare the shape of two or more distributions on one graph, a
________ is your best choice
A) frequency distribution
B) histogram
C) percentage polygon
D) relative frequency distribution
AutoTrader.com would like to test if a difference exists in the age of three different
types of vehicles currently on the road–trucks, cars, and vans. The following data
represent the age of a random sample of trucks, cars, and vans.
The critical value for the Tukey-Kramer critical range using α = 0.05 is ________.
A) 3.08
B) 3.11
C) 3.77
D) 3.95
The following data represent the number of sweatshirts sold for each of the past six
days for Hoys Department Store at the beach in Avalon, New Jersey.
Using an exponential smoothing technique with alpha equal to 0.4, the sales forecast for
Day 7 is ________.
A) 8.7
B) 10.2
C) 10.9
D) 11.5
The Department of Education would like to test the hypothesis that the median debt
load of graduating students with a Bachelor’s degree is equal to $17,000. The following
table summarizes the debt load of a random sample of graduating students with a
Bachelor’s degree.
The test statistic for this hypothesis test is ________.
A) 1.10
B) 1.54
C) 1.84
D) 2.25
Jeff sells the New York Times Sunday newspaper at a city corner near several churches.
He sells each newspaper for $6.50 after purchasing them for $4.00. Any unsold
newspaper can be returned to the New York Times for a $0.75 credit. Jeff expects
demand on Sunday to be 75, 100, 125, or 150 newspapers and would like to order one
of these four quantities from the New York Times. If the Jeff uses the maximax
criterion, how many newspapers will he order?
A) 75
B) 100
C) 125
D) 150
When performing one-way ANOVA, we partition the total sum of squares into the
_______.
A) sum of squares between (SSB) and sum of squares block (SSBL)
B) sum of squares interaction (SSAB) and sum of squares error (SSE)
C) sum of squares between (SSB) and sum of squares within (SSW)
D) sum of squares block (SSBL) and sum of squares error (SSE)
Nintendo Sony would like to test the hypothesis that a difference exists in the average
age of users of a Wii, a PlayStation, or an Xbox console game. The following data
represent the age of a random sample of Wii, PlayStation, and Xbox users.
The Tukey-Kramer critical range using α = 0.05 is ________.
A) 9.43
B) 11.15
C) 13.97
D) 14.24
The following data represent the number of refrigerators sold for each of the past five
months for Templeton Appliances.
Using a two-period weighted moving average with weights 4 and 1, the forecasting
error for Month 3 is ________.
A) 2.5
B) -4.0
C) 19.0
D) -11.0
A professor would like to test the hypothesis that the average number of minutes that a
student needs to complete a statistics exam has a standard deviation that is less than 5.0
minutes. The correct hypothesis statement would be ________.
A)
B)
C)
D)
The following table displays the amount of data that Steve has used each month, in GB,
with his iPhone during the past six months.
The trend projection intercept for this data is ________.
A) -1.6723
B) -2.0089
C) 2.6000
D) 3.9803
Use the following information to answer the question(s) below.
The National Football League has developed a regression model to predict the number
of wins during a season for a team using the following independent variables:
•Average points per game during the season (PPG)
•Average number of penalties committed per game during the season (PEN)
•Turnover differential during the season (TO)
Turnover differential is defined as the number of times the team took the ball away from
their opponent with a turnover minus the number of times the team gave the ball away to
their opponent with a turnover. For example, if TO = +5, the team had five more
takeaways than giveaways. If TO = “7, the team had seven more giveaways than
takeaways during the season.
The following Excel output shows the partially completed regression output from a
random season.
The adjusted for this regression model is ________.
A) 0.6019
B) 0.6148
C) 0.6521
D) 0.8075
Including a blocking factor that is not effective in randomized block ANOVA could
result in ____________________.
A) decreasing the probability of a Type I error
B) decreasing the probability of a Type II error
C) increasing the probability of a Type I error
D) increasing the probability of a Type II error
A multiple choice test has 12 questions, with each question having five choices. The
number of different ways a student can answer the 12 questions is ________.
A) 128
B) 480
C) 792
D) 95,040
A fast food restaurant would like to examine the wait time for customers who use the
drive-thru window. The following class boundaries are appropriate to construct a
frequency distribution for this data.
Use the following information to answer the question(s) below.
The National Football League has developed a regression model to predict the number
of wins during a season for a team using the following independent variables:
•Average points per game during the season (PPG)
•Average number of penalties committed per game during the season (PEN)
•Turnover differential during the season (TO)
Turnover differential is defined as the number of times the team took the ball away from
their opponent with a turnover minus the number of times the team gave the ball away to
their opponent with a turnover. For example, if TO = +5, the team had five more
takeaways than giveaways. If TO = “7, the team had seven more giveaways than
takeaways during the season.
The following Excel output shows the partially completed regression output from a
random season.
The mean square regression for this model is ________.
A) 196.26
B) 65.42
C) 17.49
D) 3.74
Costco is a warehouse store that has two types of membership standard and executive.
The following table shows the gender and type of membership of the last 20 customers
at a particular store.
Construct a contingency table for this data.
Nintendo Sony would like to test the hypothesis that a difference exists in the average
age of users of a Wii, a PlayStation, or an Xbox console game. The following data
represent the age of a random sample of Wii, PlayStation, and Xbox users.
Using α = 0.05, the critical value for this hypothesis test would be ________.
A) 3.885
B) 4.581
C) 5.718
D) 6.040
Consider the partially completed two-way ANOVA summary table.
Using α = 0.05, a conclusion for this ANOVA procedure would be that because the
Factor A test statistic is
_____________________________________________________________________.
A) more than the critical value, we can reject the null hypothesis and conclude that
there is a difference in average means for the Factor A populations
B) less than the critical value, we can reject the null hypothesis and conclude that there
is no difference in average means for the Factor A populations
C) less than the critical value, we cannot reject the null hypothesis and conclude that
there is no difference in average means for the Factor A populations
D) more than the critical value, we cannot reject the null hypothesis and conclude that
there is a difference in average means for the Factor A populations
Data Analysis ToolPak in Excel can be used to determine the mode for categorical data.
A novel on the Amazon.com web site has the following ratings, in number of stars,
from reviewers:
What is the probability that a randomly selected review is more than 3 stars?
A) 0.21
B) 0.38
C) 0.55
D) 1.00
According to the Mortgage Bankers Association, 11% of U.S. mortgages were
delinquent last year. A delinquent mortgage is one that has missed at least one payment
but has not yet gone to foreclosure. A random sample of six mortgages was selected.
What is the probability that one or more of these mortgages is delinquent?
A) 0.1737
B) 0.2236
C) 0.5030
D) 0.5632
The Dean of the Business School at City University would like to test the hypothesis
that a difference exists between the median final exam grades for the Introduction to
Marketing course and the Introduction to Finance course. A random sample of eight
students who took both courses was selected and their final exam grade for each course
is shown below.
The test statistic for this hypothesis test is ________.
A) 4.0
B) 7.5
C) 19.0
D) 38.5
The following data represent the wait time, in minutes, for customers calling Comcast
technical support.
The interquartile range is
A) 7 minutes.
B) 9 minutes.
C) 10 minutes.
D) 12 minutes.
The time for a professor to grade an exam is normally distributed with a mean of 16.3
minutes and a standard deviation of 4.2 minutes. What is the probability that a
randomly selected exam will require more than 15 minutes to grade?
A) 0.3783
B) 0.4548
C) 0.5664
D) 0.6217
Use the information below to answer the following question(s).
Cape May Realty manages rental beach properties during the summer season for
property owners. They would like to determine if a relationship exists between the
square footage of beach property and the weekly rental rates during the summer season.
Simple regression analysis was performed using a random sample of beach properties
with the results shown below.
Which one of the following statements is true using α = 0.05?
A) Because the p-value for the slope is 0.0423, we can reject the null hypothesis and
conclude that there is a relationship between the weekly rental and square footage of
beach property.
B) Because the p-value for the slope is 0.0423, we fail to reject the null hypothesis and
conclude that there is a relationship between the weekly rental and square footage of
beach property.
C) Because the p-value for the slope is 0.0870, we can reject the null hypothesis and
conclude that there is a relationship between the weekly rental and square footage of
beach property.
D) Because the p-value for the slope is 0.0870, we fail to reject the null hypothesis and
conclude that there is no relationship between the weekly rental and square footage of
beach property.
Proportion data follow the ________ distribution, which can be approximated by the
________ distribution under the following conditions: and .
A) exponential, binomial
B) binomial, normal
C) Poisson, normal
D) normal, exponential
The Department of Education would like to test the hypothesis that the median debt
load of graduating students with a Bachelor’s degree is equal to $17,000. The following
table summarizes the debt load of a random sample of graduating students with a
Bachelor’s degree.
The appropriate nonparametric procedure for this analysis is the _________________
test.
A) sign
B) Wilcoxon signed-rank
C) Kruskal-Wallis
D) Wilcoxon rank-sum
Consider the following stem and leaf display.
Which data value occurs most often?
A) 1
B) 21
C) 22
D) 200
Sheridan Motors is a car dealership that would like to investigate if there is a difference
in the average number of car sales per month between three sales employees using a
randomized block ANOVA. The following data represent the number of car sales last
year for these employees for six different months.
The main factor critical value for this hypothesis test using α = 0.05 would be
________.
A) 3.825
B) 4.103
C) 5.738
D) 6.044
The airline industry defines no-shows as passengers who have purchased a ticket but
fail to arrive at the gate on time for departure. Southwest Airlines operates many flights
from Philadelphia to Dallas and experienced the following no-show probability
distribution last year.
The following data represent the number of no-shows that occurred on a random sample
of 120 flights between these two cities this year.
Southwest Airlines would like to know if the probability distribution of no-shows has
changed between last year and this year on flights between these two cities using α =
0.05. The expected frequency of three no-shows for this sample is ________.
A) 21.4
B) 25.1
C) 27.8
D) 33.6