TESTBANK
n
,MULTIPLE CHOICE. n
Choose the one alternative that best completes the statement or answers the question.
n n n n n n n n n n n n
Solve the problem.
n n
1) In a sample of 775 senior citizens, approximately 67% said that they had seen a television
n n n n n n n n n n n n n n n 1) n
commercial for life insurance. About how many senior citizens is this?
n n n n n n n n n n n
A) Not enough information available. B) 519 n n n n
C) 67 n D) 256 n
Answer: B n
2) A two-way table could be used for which of the following pairs of variables?
n n n n n n n n n n n n n 2) n
A) Gender and age B) Age and favorite class n n n n n n
C) Gender and favorite class n D)Age and height n n n n n n
Answer: C
n n
Indicate whether the study described is an observational study or a controlled experiment.
n n n n n n n n n n n n
3) "People with diabetes are at higher risk for certain cancers than those without the blood sugar
n n n n n n n n n n n n n n n 3) n
disease, suggests a new study based on a telephone survey of nearly 400,000 adults."
n n n n n n n n n n n n n n
A) Controlled experiment B) Observational study n n n
Answer: B
n n
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
n n n n n n n n n n n n n n n
Answer the question.
n n
4) The number of clinically obese men in State A is 156,261 and the number of clinically obese men
n n n n n n n n n n n n n n n n n 4) n
in State B is 294,269. Someone makes the claim that this is evidence that men exercise more in
n n n n n n n n n n n n n n n n n n
State A. What information is missing that might contradict this claim?
n n n n n n n n n n n
Answer: We need to know the total number of men in State A and State B so that a
n n n n n n n n n n n n n n n n n n
comparison can be made of the percentage of the men in each state that are clinically
n n n n n n n n n n n n n n n n
obese. There could be a much higher male population in State B than State A. Also,
n n n n n n n n n n n n n n n n
assumptions about exercise and obesity are being made.
n n n n n n n n
1
,MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
n n n n n n n n n n n n n n
Use the data in Table 1A to answer the question.
n n n n n n n n n
Note: 1 is female, 0 is male.
n n n n n n
5) Suppose you wanted to know whether the student's commute distance was associated with the
n n n n n n n n n n n n n 5) n
student's living situation. Using the data table if possible, which variables would you
n n n n n n n n n n n n n
use? n
A) Use Commute Distance (Miles) and Living Situation. n n n n n n
B) Data on student's living situation are not included in this study. n n n n n n n n n n
C) Use Commute Distance (Miles) and College Units Acquired. n n n n n n n
D) UseCollege Units Acquired and Living Situation. n n n n n n
Answer: A
n n
In a study of 1350 elementary school children, 118 out of the 615 girls in the study said they want to be a teacher when they
n n n n n n n n n n n n n n n n n n n n n n n n n
grow up.
n n
6) What percent of girls want to be a teacher when they grow up?
n n n n n n n n n n n n 6)
A) 45.6% B) 80.8% C) 8.7% n n D) 19.2%n
Answer: D n
Determine if the following scenario is an observational study or a controlled experiment.
n n n n n n n n n n n n
7) A doctor is interested in determining whether a certain medication increases the risk of high blood
n n n n n n n n n n n n n n n 7) n
pressure. He randomly selects 100 people for his study - 50 who will take the medication, and 50 who
n n n n n n n n n n n n n n n n n n n
will take a placebo. He checks the patients' blood pressures weekly for six months.
n n n n n n n n n n n n n n
A) Observational study B) Neither C) Controlled experiment n n n n
Answer: C
n n
Solve the problem.
n n
8) The number of parents who attended parent teacher conferences at a local elementary school is an
n n n n n n n n n n n n n n n
8) n
example of what type of variable?
n n n n n n
A) Numerical variable B) Categorical variable C)Neither n n n n
Answer: A
n n
2
, SHORT ANSWER. Write the word orphrase that best completes each statement or answers the question.
n n n n n n n n n n n n n n n
Determine if the following scenario is an observational study or a controlled experiment and explain your reasoning.
n n n n n n n n n n n n n n n n
9) A doctor is interested in determining whether a certain medication is effective at treating
n n n 9) n n n n n n n n n n n
abdominal pain. He reviews his patients' medical records and finds that a higher
n n n n n n n n n n n n n
proportion of people who took the medication fewer abdominal pain symptoms than those
n n n n n n n n n n n n n
who did not take the medication.
n n n n n n
Answer: This is an observational study because the doctor did not randomly assign patients
n n n n n n n n n n n n n
into groups. Instead, he simply looked at medical files.
n n n n n n n n n
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve
n n n n n n n n n n n n n n n
the problem.
n n
10) A two-way table is useful for describing which types of variables?
n n n n n n n n n n 10) n
A) One numerical variable. n n
B) Two categorical variables. n n
C) One numerical variable and one categorical variable.
n n n n n n
D) Two numerical variables. n n
Answer: B
n n
11) The following data table is organized using which method?
n n n n n n n n 11) n
Gender Age
Male 35
Female 42
Female 33
Male 37
Female 39 n n
A) This is stacked data because each row represents one person.
n n n n n n n n n
B) This is unstacked data because the ages are separated by groups (in this case, gender).
n n n n n n n n n n n n n n
C) This is stacked data because the ages are separated by groups (in this case, gender).
n n n n n n n n n n n n n n
D) This is unstacked data because each row represents one person.
n n n n n n n n n
Answer: A
n n
SHORT ANSWER. Write the word orphrase that best completes each statement or answers the question.
n n n n n n n n n n n n n n n
12) According to the following two-way table, why are percentages more useful than counts to
n n n n n n n n n n n n n
12) n
compare the amount of males and females who eat breakfast?
n n n n n n n n n n
Answer: The group sizes are different. There are 55 males, but only45 females.
n n n n n n n n n n n n n
3
n
,MULTIPLE CHOICE. n
Choose the one alternative that best completes the statement or answers the question.
n n n n n n n n n n n n
Solve the problem.
n n
1) In a sample of 775 senior citizens, approximately 67% said that they had seen a television
n n n n n n n n n n n n n n n 1) n
commercial for life insurance. About how many senior citizens is this?
n n n n n n n n n n n
A) Not enough information available. B) 519 n n n n
C) 67 n D) 256 n
Answer: B n
2) A two-way table could be used for which of the following pairs of variables?
n n n n n n n n n n n n n 2) n
A) Gender and age B) Age and favorite class n n n n n n
C) Gender and favorite class n D)Age and height n n n n n n
Answer: C
n n
Indicate whether the study described is an observational study or a controlled experiment.
n n n n n n n n n n n n
3) "People with diabetes are at higher risk for certain cancers than those without the blood sugar
n n n n n n n n n n n n n n n 3) n
disease, suggests a new study based on a telephone survey of nearly 400,000 adults."
n n n n n n n n n n n n n n
A) Controlled experiment B) Observational study n n n
Answer: B
n n
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
n n n n n n n n n n n n n n n
Answer the question.
n n
4) The number of clinically obese men in State A is 156,261 and the number of clinically obese men
n n n n n n n n n n n n n n n n n 4) n
in State B is 294,269. Someone makes the claim that this is evidence that men exercise more in
n n n n n n n n n n n n n n n n n n
State A. What information is missing that might contradict this claim?
n n n n n n n n n n n
Answer: We need to know the total number of men in State A and State B so that a
n n n n n n n n n n n n n n n n n n
comparison can be made of the percentage of the men in each state that are clinically
n n n n n n n n n n n n n n n n
obese. There could be a much higher male population in State B than State A. Also,
n n n n n n n n n n n n n n n n
assumptions about exercise and obesity are being made.
n n n n n n n n
1
,MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
n n n n n n n n n n n n n n
Use the data in Table 1A to answer the question.
n n n n n n n n n
Note: 1 is female, 0 is male.
n n n n n n
5) Suppose you wanted to know whether the student's commute distance was associated with the
n n n n n n n n n n n n n 5) n
student's living situation. Using the data table if possible, which variables would you
n n n n n n n n n n n n n
use? n
A) Use Commute Distance (Miles) and Living Situation. n n n n n n
B) Data on student's living situation are not included in this study. n n n n n n n n n n
C) Use Commute Distance (Miles) and College Units Acquired. n n n n n n n
D) UseCollege Units Acquired and Living Situation. n n n n n n
Answer: A
n n
In a study of 1350 elementary school children, 118 out of the 615 girls in the study said they want to be a teacher when they
n n n n n n n n n n n n n n n n n n n n n n n n n
grow up.
n n
6) What percent of girls want to be a teacher when they grow up?
n n n n n n n n n n n n 6)
A) 45.6% B) 80.8% C) 8.7% n n D) 19.2%n
Answer: D n
Determine if the following scenario is an observational study or a controlled experiment.
n n n n n n n n n n n n
7) A doctor is interested in determining whether a certain medication increases the risk of high blood
n n n n n n n n n n n n n n n 7) n
pressure. He randomly selects 100 people for his study - 50 who will take the medication, and 50 who
n n n n n n n n n n n n n n n n n n n
will take a placebo. He checks the patients' blood pressures weekly for six months.
n n n n n n n n n n n n n n
A) Observational study B) Neither C) Controlled experiment n n n n
Answer: C
n n
Solve the problem.
n n
8) The number of parents who attended parent teacher conferences at a local elementary school is an
n n n n n n n n n n n n n n n
8) n
example of what type of variable?
n n n n n n
A) Numerical variable B) Categorical variable C)Neither n n n n
Answer: A
n n
2
, SHORT ANSWER. Write the word orphrase that best completes each statement or answers the question.
n n n n n n n n n n n n n n n
Determine if the following scenario is an observational study or a controlled experiment and explain your reasoning.
n n n n n n n n n n n n n n n n
9) A doctor is interested in determining whether a certain medication is effective at treating
n n n 9) n n n n n n n n n n n
abdominal pain. He reviews his patients' medical records and finds that a higher
n n n n n n n n n n n n n
proportion of people who took the medication fewer abdominal pain symptoms than those
n n n n n n n n n n n n n
who did not take the medication.
n n n n n n
Answer: This is an observational study because the doctor did not randomly assign patients
n n n n n n n n n n n n n
into groups. Instead, he simply looked at medical files.
n n n n n n n n n
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve
n n n n n n n n n n n n n n n
the problem.
n n
10) A two-way table is useful for describing which types of variables?
n n n n n n n n n n 10) n
A) One numerical variable. n n
B) Two categorical variables. n n
C) One numerical variable and one categorical variable.
n n n n n n
D) Two numerical variables. n n
Answer: B
n n
11) The following data table is organized using which method?
n n n n n n n n 11) n
Gender Age
Male 35
Female 42
Female 33
Male 37
Female 39 n n
A) This is stacked data because each row represents one person.
n n n n n n n n n
B) This is unstacked data because the ages are separated by groups (in this case, gender).
n n n n n n n n n n n n n n
C) This is stacked data because the ages are separated by groups (in this case, gender).
n n n n n n n n n n n n n n
D) This is unstacked data because each row represents one person.
n n n n n n n n n
Answer: A
n n
SHORT ANSWER. Write the word orphrase that best completes each statement or answers the question.
n n n n n n n n n n n n n n n
12) According to the following two-way table, why are percentages more useful than counts to
n n n n n n n n n n n n n
12) n
compare the amount of males and females who eat breakfast?
n n n n n n n n n n
Answer: The group sizes are different. There are 55 males, but only45 females.
n n n n n n n n n n n n n
3
