AP Statistics Unit 7 Progress Check:
MCQ Part A Exam Questions and
Answers Verified Solutions Latest
Update (2026/2027)
Question:
sociologist wants to estimate the average total number of minutes spent on
social media per day in the
population. A random sample of 50 high school students was selected, and
they were asked, "How many
minutes per day, on average, do you spend visiting social media sites?"
Which of the following is the most appropriate inference procedure for the
sociologist to use? -
Answer:
B. A one-sample t-interval for a population mean
Question:
To study the effectiveness of a certain adult reading program, researchers
will select a random sample
of adults who are eligible for the program. The selected adults will be given
a pretest before beginning
the program and a posttest after completing the program. The difference in
the number of correct
Answer:
s on the pretest and the number of correct answers on the posttest will be
recorded for each
, adult in the sample.
Question:
Which of the following is the most appropriate inference procedure for the
researchers to use to
analyze the results?
Answer:
C. A matched-pairs t-interval for a population mean difference
Question:
A researcher studying the sleep habits of teens will select a random sample
of n teens from the
population to survey. The researcher will construct a t-interval to estimate
the mean number of hours of
sleep that teens in the population get each night. Which of the following is
true about the t-distribution
as the value of n decreases from 40 to 20?
Answer:
E. The center remains constant, and the
area in the tails of the distribution increases.
Question:
What happens to a t-distribution as the degrees of freedom increase?
Answer:
MCQ Part A Exam Questions and
Answers Verified Solutions Latest
Update (2026/2027)
Question:
sociologist wants to estimate the average total number of minutes spent on
social media per day in the
population. A random sample of 50 high school students was selected, and
they were asked, "How many
minutes per day, on average, do you spend visiting social media sites?"
Which of the following is the most appropriate inference procedure for the
sociologist to use? -
Answer:
B. A one-sample t-interval for a population mean
Question:
To study the effectiveness of a certain adult reading program, researchers
will select a random sample
of adults who are eligible for the program. The selected adults will be given
a pretest before beginning
the program and a posttest after completing the program. The difference in
the number of correct
Answer:
s on the pretest and the number of correct answers on the posttest will be
recorded for each
, adult in the sample.
Question:
Which of the following is the most appropriate inference procedure for the
researchers to use to
analyze the results?
Answer:
C. A matched-pairs t-interval for a population mean difference
Question:
A researcher studying the sleep habits of teens will select a random sample
of n teens from the
population to survey. The researcher will construct a t-interval to estimate
the mean number of hours of
sleep that teens in the population get each night. Which of the following is
true about the t-distribution
as the value of n decreases from 40 to 20?
Answer:
E. The center remains constant, and the
area in the tails of the distribution increases.
Question:
What happens to a t-distribution as the degrees of freedom increase?
Answer:
