Test Bank For Essentials of Statistics 7th Edition by Mario F. Triola

Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1)
A ________ is the complete collection of all measurements or data collected, whereas, a ________ is
a subcollection of members selected from the complete collection.
1)
A)
population; parameter
B)
population; sample
C)
sample; population
D)
sample; census
2)
Determine which level of measurement is appropriate. Salaries of college professors.
2)
A)
Ordinal
B)
Nominal
C)
Interval
D)
Ratio
3)
Determine whether the given value is a discrete or continuous variable. People are asked to state
how many times in the last month they visited their family doctor.
3)
A)
Discrete
B)
Continuous
4)
Identify which type of sampling is used. The name of each contestant is written on a separate card,
the cards are placed in a bag, and three names are picked from the bag.
4)
A)
Simple Random
B)
Convenience
C)
Cluster
D)
Systematic
E)
Stratified
5)
There are many potential pitfalls that can cause problems when analyzing data. Which of these
choices are not classified as a potential pitfall?
5)
A)
Nonresponse
B)
Measured data
C)
Order of survey questions
D)
Self
-
reported data
6)
Determine whether the given description corresponds to an experiment or an observational study.
A stock analyst selects a stock from a group of twenty for investment by choosing the stock with the
greatest earnings per share reported for the last quarter.
6)
A)
Experiment
B)
Observational study
7)
On a test, 74% of the questions are answered correctly. If 111 questions are correct, how many
questions are on the test?
7)
A)
37 questions
B)
82 questions
C)
150 questions
D)
67 questions
8)
A management survey for a company surveyed 235 employees. 44.7% of the employees surveyed
were females. The number of males would be ________.
8)
A)
105
B)
130
C)
13
D)
Unable to determine
1 9)
Identify which type of sampling is used.
A pollster uses a computer to generate 500 random
numbers, then interviews the voters corresponding to those numbers.
9)
A)
Stratified
B)
Cluster
C)
Random
D)
Convenience
E)
Systematic
10)
Determine which of the four levels of measurement is most appropriate. Level of satisfaction of
survey respondents.
10)
A)
Ratio
B)
Ordinal
C)
Nominal
D)
Interval
11)
Correlation does not imply ________.
11)
A)
bias
B)
linearity
C)
causation
D)
significance
12)
A tax auditor selects every 1000th income tax return that is received. Identify which of these types
of sampling is used.
12)
A)
Simple Random
B)
Convenience
C)
Systematic
D)
Cluster
E)
Stratified
13)
The similarity between an ordinal level of measurement and an interval level of measurement is
that ________.
13)
A)
differences between data values cannot be determined or are meaningless
B)
differences between data values can be determined and are meaningful
C)
both can be arranged in some order
D)
neither can be arranged in some order
14)
Determine which level of measurement is appropriate. A sample of children's balls are classified
from softest to hardest.
14)
A)
Ratio
B)
Nominal
C)
Interval
D)
Ordinal
15)
Which of the following does not apply to the ratio level of measurement?
15)
A)
Differences between data values can be found and are meaningful
B)
There is a natural zero starting point
C)
Cannot be arranged in order
D)
Can be arranged in order
16)
Determine whether the given description corresponds to an observational study or an experiment.
A doctor gives a new medication to half of his patients with the flu and a placebo to the other half
of his patients with the flu.
16)
A)
Experiment
B)
Observational study
17)
Researchers collect data by interviewing athletes who have won Olympic gold medals from 1992 to
2016. Identify the type of study.
17)
A)
Retrospective
B)
Prospective
C)
Cross
-
sectional
D)
None of these
2 18)
Identify which type of sampling is used. To avoid working late, a quality control analyst simply
inspects the first 100 items produced in a day.
18)
A)
Convenience
B)
Stratified
C)
Cluster
D)
Systematic
E)
Simple Random
19)
Determine whether the given value is a statistic or a parameter. Thirty percent of all dog owners
poop scoop after their dog.
19)
A)
Statistic
B)
Parameter
20)
A marketing firm does a survey to find out how many people use a product. Of the one hundred
people contacted, fifteen said they use the product. Identify the type of study used.
20)
A)
Observational study
B)
Experiment
21)
Identify the type of observational study used. A town obtains current employment data by polling
10,000 of its citizens this month.
21)
A)
Prospective
B)
Cross
-
sectional
C)
Retrospective
D)
None of these
22)
What type of data values are quantitative and the number of values is finite or countable?
22)
A)
Categorical
B)
Interval
C)
Continuous
D)
Discrete
23)
Determine whether the given value is a statistic or a parameter. After taking the first exam, 15 of
the students dropped the class.
23)
A)
Statistic
B)
Parameter
24)
Identify the type of study used. A town obtains current employment data by polling 10,000 of its
citizens this month.
24)
A)
Prospective
B)
Cross
-
sectional
C)
Retrospective
D)
None of these
25)
Identify which type of sampling is used. A tax auditor selects every 1000th income tax return that is
received.
25)
A)
Systematic
B)
Stratified
C)
Random
D)
Cluster
E)
Convenience
26)
A marijuana survey included 1610 responses from a list of approximately 241,500,000 adults in the
United States from which every 150,000
th name was surveyed. Identify which of these types of
sampling is used:
26)
A)
Simple random
B)
Systematic
C)
Convenience
D)
Stratified
E)
Cluster
3 27)
A psychology student wishes to investigate differences in political opinions between business
majors and political science majors at her college. She randomly selects 100 students from the 260
business majors and 100 students from the 180 political science majors. Does this sampling plan
result in a random sample? Simple random sample? Explain.
27)
A)
Yes; no. The sample is random because all students have the same chance of being selected. It
is not a simple random sample because some samples are not possible, such as a sample
consisting of 50 business majors and 150 political science majors.
B)
No; no. The sample is not random because political science majors have a greater chance of
being selected than business majors. It is not a simple random sample because some samples
are not possible, such as a sample consisting of 50 business majors and 150 political science
majors.
C)
No; yes. The sample is not random because political science majors have a greater chance of
being selected than business majors. It is a simple random sample because all samples of size
200 have the same chance of being selected.
D)
Yes; yes. The sample is random because all students have the same chance of being selected. It
is a simple random sample because all samples of size 200 have the same chance of being
selected.
28)
Which type of experiment separates subjects into groups that are similar but differ in ways that
might affect the outcome of the experiment?
28)
A)
Rigorously controlled design
B)
Completely randomized design
C)
Matched pairs design
D)
Randomized block design
29)
Identify which type of sampling is used. A research team wants to study the demographics of
college students in the United States using proportionate samples of students in majors reflecting
actual U.S. percentages.
29)
A)
Convenience
B)
Systematic
C)
Stratified
D)
Simple random
E)
Cluster
30)
Determine whether the given value is from a discrete or continuous data set. The time it takes a
computer to complete a task.
30)
A)
Continuous
B)
Discrete
31)
The good design of experiments includes blinding, ________, and ________.
31)
A)
replication; randomization
B)
replication; experimentation
C)
replication; voluntary response samples
D)
internalization; randomization
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