3. You are testing a new medication for relief of migraine headache pain. You randomly assign

26 of the subjects to the new medication and 25 of the subjects to the traditional medication,

The amount of time to achieve headache relief is then compared between these two groups.

What type of study is this?

A. a completely randomized experiment

B. an observational study based on a multistage sample

C. a randomized block experiment

D. a matched pairs experiment

E. an observational study based on a simple random sample

F. an observational study based on a stratified random sample

41. A clinic specializing in diabetes wants to determine which of two diets is best for helping

patients stabilize their blood glucose levels. They conduct a study where recruited patients are

put on one diet and monitored for six months and then put on the other diet and monitored

for six months. The order of diets is randomly assigned to each patient. What type of study is

this?

A. This is a completely randomized block experiment

B. This is an observational study using a SRS.

C. This is a completely randomized experiment.

D. This is an observational study using a stratified random sample.

E. This is a matched pairs experiment.

A study of cheating among college students interviewed a sample of 472 college students; 155 of the

students admitted to learning what was on a test from a student who had already taken the test at least

once in the past year.

42. Which of the following describes the parameter p?

A. p is the proportion of all cheating college students who learn what is on a test from a student

who has already taken the test.

B. p is the proportion of all college students who admit to learning what is on a test from a

student who has already taken the test at least once in the past year.

C. p is the proportion of all college students who admit to cheating.

D. p is the proportion of the 472 sampled college students admitted to learning what is on a test

from a student who has already taken the test at least once in the past year.

43. What is the numerical value of the statistic p that estimates p?

A. 0.147

B. 0.328

C. 0.672

D. 0.891