AP Statistics Unit 6 Progress Check:
MCQ Part D Exam Questions and
Answers Verified Solutions Latest
Update (2026/2027)
Question:
nonsmokers, random samples from each group were selected. The sample
proportion of people with
CVD was calculated for each group, and a 95 percent confidence interval for
the difference (smoker
minus nonsmoker) was given as (−0.01, 0.04). Which of the following is the
best interpretation of the
interval?
Answer:
B. We are 95% confident that the difference in proportions for smokers and
nonsmokers with CVD in the population is between −0.01 and 0.04.
Question:
A research group studying cell phone habits asked the question "Do you ever
use your cell phone to
make a payment at a convenience store?" to people selected from two
random samples of cell phone
users. One sample consisted of older adults, ages 35 years and older, and the
other sample consisted of
younger adults, ages 18 years to 34 years. The proportion of people who
answered yes in each sample
was used to create a 95 percent confidence interval of (0.097, 0.125) to
estimate the difference
, (younger minus older) between the population proportions of people who
would answer yes to the
Answer:
Question:
. Which of the following is the best description of what is meant by 95
percent confidence? -
Answer:
C. In repeated random sampling with the same sample size, approximately
95% of the
intervals constructed from the samples will capture the difference in
population proportions of people
who would answer yes to the question.
Question:
Consider a 90 percent confidence interval constructed to estimate the
difference between two
population proportions. Which of the following is the best interpretation of
what is meant by 90 percent
confidence?
Answer:
D. For repeated random sampling from the populations with samples of
the same size, approximately 90% of the confidence intervals constructed
will capture the true
difference between the population proportions.
MCQ Part D Exam Questions and
Answers Verified Solutions Latest
Update (2026/2027)
Question:
nonsmokers, random samples from each group were selected. The sample
proportion of people with
CVD was calculated for each group, and a 95 percent confidence interval for
the difference (smoker
minus nonsmoker) was given as (−0.01, 0.04). Which of the following is the
best interpretation of the
interval?
Answer:
B. We are 95% confident that the difference in proportions for smokers and
nonsmokers with CVD in the population is between −0.01 and 0.04.
Question:
A research group studying cell phone habits asked the question "Do you ever
use your cell phone to
make a payment at a convenience store?" to people selected from two
random samples of cell phone
users. One sample consisted of older adults, ages 35 years and older, and the
other sample consisted of
younger adults, ages 18 years to 34 years. The proportion of people who
answered yes in each sample
was used to create a 95 percent confidence interval of (0.097, 0.125) to
estimate the difference
, (younger minus older) between the population proportions of people who
would answer yes to the
Answer:
Question:
. Which of the following is the best description of what is meant by 95
percent confidence? -
Answer:
C. In repeated random sampling with the same sample size, approximately
95% of the
intervals constructed from the samples will capture the difference in
population proportions of people
who would answer yes to the question.
Question:
Consider a 90 percent confidence interval constructed to estimate the
difference between two
population proportions. Which of the following is the best interpretation of
what is meant by 90 percent
confidence?
Answer:
D. For repeated random sampling from the populations with samples of
the same size, approximately 90% of the confidence intervals constructed
will capture the true
difference between the population proportions.
