Test Bank
For
STATISTICS :
THE ART AND SCIENCE
OF L EARNING FROM
DATA
THIRD EDITION
Alan Agresti
Christine Franklin
Answers At The End Of Each Chapter
,Chapter 1 Exam A
Name
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Answer true or false.
1) One method of learning about the impact of randomness and variability from sample to sample is 1)
simulation.
A) True B) False
Provide an appropriate response.
2) A survey of 1500 American households found that 33% of the respondents own a computer. Is this 2)
value a parameter or a statistic?
A) statistic B) parameter
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Fill in the blank.
3) The three main aspects of statistics are , , and 3)
.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Answer true or false.
4) A large company would like to know what percentage of itʹs employees would utilize an on -site 4)
daycare facility. Rather than asking itʹs 5000 employees, each employee is assigned a number from
1 to 5000 and then a computer program is used to randomly select 100 numbers between 1 and
5000. These employees are then contacted and asked whether they would use an on -site daycare
facility. The method used to collect the sample of 100 responses produces a random sample.
A) False B) True
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Fill in the blank.
5) The basis of is that each subject in the population has the same 5)
chance of being in the sample.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Answer true or false.
6) Descriptive statistics refers to methods of making decisions or predictions about a population, 6)
based on data obtained from a sample of that population; while inferential statistics refers to
methods for summarizing the data.
A) True B) False
,SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Provide an appropriate response.
7) Drug X, a drug that claims to treat male pattern scalp hair loss, was administered for 12 7)
months to over 1800 men aged 18 to 41 with mild to moderate amounts of ongoing hair
loss. Whether they were receiving drug X or a placebo (a pill containing no medication),
all men were given a medicated shampoo. In general, men who took drug X maintained
or increased the number of visible scalp hairs; while scalp hair counts in men who took the
placebo continued to decrease. This concluded that drug X is effective in maintaining or
increasing the amount of scalp hair in men. Which statement of this example can be
referred to as descriptive statistics?
8) A recent poll asked 1,245 registered voters nationwide, ʺWhich party do you think can do 8)
a better job of handling immigration issues?ʺ 31% of the respondents answered
ʺRepublicans.ʺ With a margin of error of ±3%, it is estimated that between 28 and 34
percent of registered voters nationwide feel that the Republican party can do a better job
of handling immigration issues. Identify which part of this example is inferential.
9) Every year the U.S. Census Bureau releases the Current Population Report based on a 9)
survey of 50,000 households within the United States. Identify the population, the sample,
and the subjects for this study.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Select the most appropriate answer.
10) A short application program for performing a specific task is called a/an 10)
A) time series.
B) parameter.
C) applet.
D) None of these.
E) sampling.
Answer true or false.
11) In a recent television survey, participants were asked to answer ʺyesʺ or ʺnoʺ to the question ʺAre 11)
you in favor of the death penalty?ʺ. Six thousand five hundred responded ʺyesʺ while 3700
responded ʺnoʺ. There was a fifty-cent charge for the call. The sampling technique used produces
a random sample.
A) True B) False
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Fill in the blank.
12) The is the set of all subjects of interest; while the 12)
is a subset of the entire set of interest.
Provide an appropriate response.
13) A radio show host asks listeners whether they believe that human activity is altering the 13)
global climate. Of those calling in, only 20% responded by saying yes. Is it safe to infer
that only 20% of the general population believes that human activity is altering the global
climate?
, MULTIPLE CHOICE. K. K . Choose the one alternative that best completes the statement or answers the
K. K. K. K. K. K. K. K. K. K. K.
question.
K.
14) K.
14) The average salary of all automotive workers is $42,000. Is this value a parameter or a
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
statistic?K.
A) parameter B) statistic K.
Select the most appropriate answer.
K. K. K. K.
15) The estimation of the population average age of registered voters in the state of Ohio based on
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. 15) K.
the sample average age of 1,000 registered voters in that state and its corresponding margin of
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
error is an example of
K. K. K . K. K.
A) a statistic. K.
B) deductive statistics. K.
C) descriptive statistics. K.
D) inferential statistics. K.
E) a parameter. K.
16) The following statement refers to which aspect of a statistical study: ʺA meteorologist constructs
K. K. K. K. K. K. K. K. K. K. K. K. K. 16) K.
a graph showing the total precipitation in Phoenix, Arizona in each of the months of a
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
given yearʺ?
K. K.
A) Description B) Inference C) Design K. K.
Answer true or false.
K. K. K.
17) Parameter values are usually known. K. K. K. K. 17) K.
A) False B) True K.
Provide an appropriate response.
K. K. K.
18) Using an computer to mimic what would actually happen if you selected a sample and
K. K. K. K. K. K. K. K. K. K. K. K. K. K. 18) K.
used statistics in real life is called
K. K. K. K. K. K. K.
A) database
B) mini-tab
C) time series K.
D) random sampling K.
E) simulation
Answer true or false.
K. K. K.
19) Random sampling enables the sample to be a good reflection of the
K. K. K. K. K. K. K. K. K. K. K. 19) K.
population. K.
A) True B) False K.
Determine whether the summary measure is better described as a parameter or a
K. K. K. K. K. K. K. K. K. K. K. K.
statistic.
K. 20) K.
20) The average height of horse jockeysK. K. K. K. K.
A) Statistic B) Parameter K.
The owners of a coffee shop conducted a taste test to determine whether its customers preferred a new
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
coffee brand to the current one sold by the shop.
K. K. K.Customers who were willing to participate were given
K. K. K. K. K. K. K. K . K. K. K. K. K. K. K.
small samples of each of the two brands in random order and were asked to select which one they preferred
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
without knowing the brand. Of the 100 participating customers, 90% chose the new brand.
K. K. K. K. Based on K . K. K. K . K. K. K. K. K. K. K . K.
these results, the owners determined that a majority of their customers preferred the new brand and therefore
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
switched their coffee supplier.
K. K. K. K.
For
STATISTICS :
THE ART AND SCIENCE
OF L EARNING FROM
DATA
THIRD EDITION
Alan Agresti
Christine Franklin
Answers At The End Of Each Chapter
,Chapter 1 Exam A
Name
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Answer true or false.
1) One method of learning about the impact of randomness and variability from sample to sample is 1)
simulation.
A) True B) False
Provide an appropriate response.
2) A survey of 1500 American households found that 33% of the respondents own a computer. Is this 2)
value a parameter or a statistic?
A) statistic B) parameter
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Fill in the blank.
3) The three main aspects of statistics are , , and 3)
.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Answer true or false.
4) A large company would like to know what percentage of itʹs employees would utilize an on -site 4)
daycare facility. Rather than asking itʹs 5000 employees, each employee is assigned a number from
1 to 5000 and then a computer program is used to randomly select 100 numbers between 1 and
5000. These employees are then contacted and asked whether they would use an on -site daycare
facility. The method used to collect the sample of 100 responses produces a random sample.
A) False B) True
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Fill in the blank.
5) The basis of is that each subject in the population has the same 5)
chance of being in the sample.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Answer true or false.
6) Descriptive statistics refers to methods of making decisions or predictions about a population, 6)
based on data obtained from a sample of that population; while inferential statistics refers to
methods for summarizing the data.
A) True B) False
,SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Provide an appropriate response.
7) Drug X, a drug that claims to treat male pattern scalp hair loss, was administered for 12 7)
months to over 1800 men aged 18 to 41 with mild to moderate amounts of ongoing hair
loss. Whether they were receiving drug X or a placebo (a pill containing no medication),
all men were given a medicated shampoo. In general, men who took drug X maintained
or increased the number of visible scalp hairs; while scalp hair counts in men who took the
placebo continued to decrease. This concluded that drug X is effective in maintaining or
increasing the amount of scalp hair in men. Which statement of this example can be
referred to as descriptive statistics?
8) A recent poll asked 1,245 registered voters nationwide, ʺWhich party do you think can do 8)
a better job of handling immigration issues?ʺ 31% of the respondents answered
ʺRepublicans.ʺ With a margin of error of ±3%, it is estimated that between 28 and 34
percent of registered voters nationwide feel that the Republican party can do a better job
of handling immigration issues. Identify which part of this example is inferential.
9) Every year the U.S. Census Bureau releases the Current Population Report based on a 9)
survey of 50,000 households within the United States. Identify the population, the sample,
and the subjects for this study.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Select the most appropriate answer.
10) A short application program for performing a specific task is called a/an 10)
A) time series.
B) parameter.
C) applet.
D) None of these.
E) sampling.
Answer true or false.
11) In a recent television survey, participants were asked to answer ʺyesʺ or ʺnoʺ to the question ʺAre 11)
you in favor of the death penalty?ʺ. Six thousand five hundred responded ʺyesʺ while 3700
responded ʺnoʺ. There was a fifty-cent charge for the call. The sampling technique used produces
a random sample.
A) True B) False
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Fill in the blank.
12) The is the set of all subjects of interest; while the 12)
is a subset of the entire set of interest.
Provide an appropriate response.
13) A radio show host asks listeners whether they believe that human activity is altering the 13)
global climate. Of those calling in, only 20% responded by saying yes. Is it safe to infer
that only 20% of the general population believes that human activity is altering the global
climate?
, MULTIPLE CHOICE. K. K . Choose the one alternative that best completes the statement or answers the
K. K. K. K. K. K. K. K. K. K. K.
question.
K.
14) K.
14) The average salary of all automotive workers is $42,000. Is this value a parameter or a
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
statistic?K.
A) parameter B) statistic K.
Select the most appropriate answer.
K. K. K. K.
15) The estimation of the population average age of registered voters in the state of Ohio based on
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. 15) K.
the sample average age of 1,000 registered voters in that state and its corresponding margin of
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
error is an example of
K. K. K . K. K.
A) a statistic. K.
B) deductive statistics. K.
C) descriptive statistics. K.
D) inferential statistics. K.
E) a parameter. K.
16) The following statement refers to which aspect of a statistical study: ʺA meteorologist constructs
K. K. K. K. K. K. K. K. K. K. K. K. K. 16) K.
a graph showing the total precipitation in Phoenix, Arizona in each of the months of a
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
given yearʺ?
K. K.
A) Description B) Inference C) Design K. K.
Answer true or false.
K. K. K.
17) Parameter values are usually known. K. K. K. K. 17) K.
A) False B) True K.
Provide an appropriate response.
K. K. K.
18) Using an computer to mimic what would actually happen if you selected a sample and
K. K. K. K. K. K. K. K. K. K. K. K. K. K. 18) K.
used statistics in real life is called
K. K. K. K. K. K. K.
A) database
B) mini-tab
C) time series K.
D) random sampling K.
E) simulation
Answer true or false.
K. K. K.
19) Random sampling enables the sample to be a good reflection of the
K. K. K. K. K. K. K. K. K. K. K. 19) K.
population. K.
A) True B) False K.
Determine whether the summary measure is better described as a parameter or a
K. K. K. K. K. K. K. K. K. K. K. K.
statistic.
K. 20) K.
20) The average height of horse jockeysK. K. K. K. K.
A) Statistic B) Parameter K.
The owners of a coffee shop conducted a taste test to determine whether its customers preferred a new
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
coffee brand to the current one sold by the shop.
K. K. K.Customers who were willing to participate were given
K. K. K. K. K. K. K. K . K. K. K. K. K. K. K.
small samples of each of the two brands in random order and were asked to select which one they preferred
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
without knowing the brand. Of the 100 participating customers, 90% chose the new brand.
K. K. K. K. Based on K . K. K. K . K. K. K. K. K. K. K . K.
these results, the owners determined that a majority of their customers preferred the new brand and therefore
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
switched their coffee supplier.
K. K. K. K.
