AP STATS EXAM PREP REVIEW 2026 TESTED
QUESTIONS AND SOLUTIONS 100% CORRECT
◍ No, because the sample is not large enough to satisfy the normality
conditions. Answer: 6.2 A city planner wants to estimate the
proportion of city residents who commute to work by subway each
day. A random sample of 30 city residents was selected, and 28 of
those selected indicated that they rode the subway to work. Is it
appropriate to assume that the sampling distribution of the sample
proportion is approximately normal?
◍ A one-sample zz-interval for a population proportion Answer: 6.2
The manager of a magazine wants to estimate the percent of magazine
subscribers who approve of a new cover format. To gather data, the
manager will select a random sample of subscribers.
Which of the following is the most appropriate interval for the
manager to use for such an estimate?
◍ A one-sample zz-interval for a population proportion Answer: 6.2
The superintendent of a large school district wants to estimate the
percent of district residents who support the building of a new middle
school. To gather data, the superintendent will select a random sample
of district residents.
◍ 0.275 ±2.576√(0.275)(0.725)/80 Answer: 6.2 A random sample of
80 people was selected, and 22 of the selected people indicated that it
would be a good idea to eliminate the penny from circulation. What is
, the 99 percent confidence interval constructed from the sample
proportion pˆ ?
◍ 385 Answer: 6.2 Paul will select a random sample of students to
create a 95 percent confidence interval to estimate the proportion of
students at his college who have a tattoo. Of the following, which is
the smallest sample size that will result in a margin of error of no
more than 5 percentage points?
◍ No, because the sample was not selected using a random method.
Answer: 6.2 A school librarian wanted to estimate the proportion of
students in the school who had read a certain book. The librarian
sampled 50 students from the senior English classes, and 35 of the
students in the sample had read the book. Have the conditions for
creating a confidence interval for the population proportion been met?
◍ (1620,2180)
The 90 percent confidence interval for the proportion of people who
would indicate they were experiencing side effects from the drug is
(0.324,0.436)(0.324,0.436). The interval estimate for the number of
people who would indicate they were experiencing side effects from
the drug is found by multiplying the endpoints of the interval for the
proportions by 5,000. Answer: 6.2 Researchers investigating a new
drug selected a random sample of 200 people who are taking the drug.
Of those selected, 76 indicated they were experiencing side effects
from the drug. If 5,000 people took the drug, which of the following
is closest to the interval estimate of the number of people who would
QUESTIONS AND SOLUTIONS 100% CORRECT
◍ No, because the sample is not large enough to satisfy the normality
conditions. Answer: 6.2 A city planner wants to estimate the
proportion of city residents who commute to work by subway each
day. A random sample of 30 city residents was selected, and 28 of
those selected indicated that they rode the subway to work. Is it
appropriate to assume that the sampling distribution of the sample
proportion is approximately normal?
◍ A one-sample zz-interval for a population proportion Answer: 6.2
The manager of a magazine wants to estimate the percent of magazine
subscribers who approve of a new cover format. To gather data, the
manager will select a random sample of subscribers.
Which of the following is the most appropriate interval for the
manager to use for such an estimate?
◍ A one-sample zz-interval for a population proportion Answer: 6.2
The superintendent of a large school district wants to estimate the
percent of district residents who support the building of a new middle
school. To gather data, the superintendent will select a random sample
of district residents.
◍ 0.275 ±2.576√(0.275)(0.725)/80 Answer: 6.2 A random sample of
80 people was selected, and 22 of the selected people indicated that it
would be a good idea to eliminate the penny from circulation. What is
, the 99 percent confidence interval constructed from the sample
proportion pˆ ?
◍ 385 Answer: 6.2 Paul will select a random sample of students to
create a 95 percent confidence interval to estimate the proportion of
students at his college who have a tattoo. Of the following, which is
the smallest sample size that will result in a margin of error of no
more than 5 percentage points?
◍ No, because the sample was not selected using a random method.
Answer: 6.2 A school librarian wanted to estimate the proportion of
students in the school who had read a certain book. The librarian
sampled 50 students from the senior English classes, and 35 of the
students in the sample had read the book. Have the conditions for
creating a confidence interval for the population proportion been met?
◍ (1620,2180)
The 90 percent confidence interval for the proportion of people who
would indicate they were experiencing side effects from the drug is
(0.324,0.436)(0.324,0.436). The interval estimate for the number of
people who would indicate they were experiencing side effects from
the drug is found by multiplying the endpoints of the interval for the
proportions by 5,000. Answer: 6.2 Researchers investigating a new
drug selected a random sample of 200 people who are taking the drug.
Of those selected, 76 indicated they were experiencing side effects
from the drug. If 5,000 people took the drug, which of the following
is closest to the interval estimate of the number of people who would
