1 .If many instructors and their students repeated this same process, which number in the would help assure that the answers would tend to follow a normal distribution?

A. average 2.3

B. 50,000 people in town

C. 30 students surveyed

D. standard deviation 0.7

2 . Given the information above, about what percentage (please round to the nearest whole number percent) of instructor's class averages would be within 1 standard deviation of the true mean?

3 . An ambitious statistics teacher is very curious what experiences other people in her small college town have with the local police department.Since there are nearly 50,000 people in the town and life is short, she asks a group of 200 students to share their experiences. She asks each of them whether or not they have been stopped by the local police.

In this case, the question of interest is

A.who should be surveyed for this question?

B.what is the sample size (n)?

C.what fraction of people approve of the local police?

D.what fraction of people are stopped by the local police?

and the data is

quantitive or qualitative

4 . Given the information above, about what percentage (please round to the nearest whole number percent) of instructor's class averages would be within 1 standard deviation of the true mean?

5 . An ambitious statistics teacher is very curious what experiences other people in her small college town have with the local police department.Since there are nearly 50,000 people in the town and life is short, she asks a group of 200 students to share their experiences. She asks each of them whether or not they have been stopped by the local police.

In this case, the question of interest is

[ Select ]

who should be surveyed for this question?

what is the sample size (n)?

what fraction of people approve of the local police?

what fraction of people are stopped by the local police?

and the data is

[ Select ]

quantitative

qualitative .

6 . Suppose 111 of the 200 respondents above reported being pulled over.What isp

(pbar)?Round your answer (but never your work in progress!) to the nearest 0.01.

7 . Given your estimate for pbar, is the sample size large enough?

Group of answer choices

no, because (1-pbar) is too low

yes- pbar and 1-pbar are both OK.

no, because (pbar) is too low

no, because (pbar) is too low

no, because (1-pbar) is too high

8 . If the true population proportion is 0.3000, what is the center and spread of the sampling distribution of the proportion?In other words, what sorts of answers for the sample proportion pbar should we expect to see most of the time we survey groups of 200 like this?

Group of answer choices

center p=

[ Choose ]

0.0324

0.45826

0.3000

0.7

0.00105

spread sigma_p=

[ Choose ]

0.0324

0.45826

0.3000

0.7

0.00105