• Home
  • Textbooks
  • AP Statistics with 6 Practice Tests
  • Collecting Data

AP Statistics with 6 Practice Tests

Martin Sternstein

Chapter 3

Collecting Data - all with Video Answers

Educators

Section 10

Quiz 10

01:27

Problem 1

A school psychologist wants to investigate student depression. She selects, at random, samples of 30 freshmen, 30 sophomores, 30 juniors, and 30 seniors to interview. Which of the following best describes the principal's sampling plan?
(A) A convenience sample
(B) A simple random sample
(C) A stratified random sample
(D) A cluster sample
(E) A systematic sample

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
02:00

Problem 2

Which of the following is a true statement?
(A) If bias is present in a sampling procedure, it can be overcome by dramatically increasing the sample size.
(B) There is no such thing as a "bad sample."
(C) Sampling techniques that use probability techniques effectively eliminate bias.
(D) Convenience samples often lead to undercoverage bias.
(E) Voluntary response samples often underrepresent people with strong opinions.

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
01:32

Problem 3

Which of the following is a true statement about sampling
error?
(A) Sampling error can be eliminated only if a survey is both extremely well designed and extremely well conducted.
(B) Sampling error reflects natural variation between samples, is always present, and can be described using probability.
(C) Sampling error is generally larger when the sample size is larger.
(D) Sampling error implies an error, possibly very small, but still an error on the part of the surveyor.
(E) Sampling error is higher when bias is present.

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
01:27

Problem 4

Many colleges are moving toward coed dormitories. A Residential Life director plans to sample student attitudes toward this arrangement. He randomly selects three of the 12 dorms and sends a questionnaire to all residents living in
them. Which of the following best describes the director's sampling plan?
(A) A convenience sample
(B) A simple random sample
(C) A stratified random sample
(D) A cluster sample
(E) A systematic sample

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
01:33

Problem 5

Ann Landers, who wrote a daily advice column appearing in newspapers across the country, once asked her readers, "If you had it to do over again, would you have children?" Of the more than 10,000 readers who responded, $70 \%$ said no. What does this show?
(A) Voluntary response bias makes the survey meaningless.
(B) No meaningful conclusion is possible without knowing something more about the characteristics of her readers.
(C) The survey would have been more meaningful if she had picked a random sample of the 10,000 readers who responded.
(D) The survey would have been more meaningful if she had used a control group.
(E) This was a legitimate sample, randomly drawn from her readers and of sufficient size to allow the conclusion that most of her readers who are parents would have second thoughts about having children.

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
01:37

Problem 6

Each of the 30 MLB teams has 25 active roster players. A sample of 60 players is to be chosen as follows. Each team will be asked to place 25 cards with its players' names into a hat and randomly draw out two names. The two names from each team will be combined to make up the sample. Will this method result in a simple random sample of the 750 baseball players?
(A) Yes, because each player has the same chance of being selected.
(B) Yes, because each team is equally represented.
(C) Yes, because this is an example of stratified sampling, which is a special case of simple random sampling.
(D) No, because the teams are not chosen randomly.
(E) No, because not each group of 60 players has the same chance of being selected.

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator