Question

Two hundred students were selected at random from those enrolled at a large college in Alabama. Each student in the sample was asked whether they ate 5 or more apples in a typical week, and their cholesterol levels were also measured. The average cholesterol level was significantly lower for the group who ate 5 or more apples per week than for the group that did not.

A. Did the study use a random selection from some population? If yes, what was the specific population? If no, what kind of sampling method was used?

B. Did the study use random assignment to experimental groups? Yes or No

C. Would the conclusion, "Eating 5 or more apples a week lowers cholesterol" be appropriate given the study description? Explain.

D. Would it be reasonable to generalize any conclusions from this study to some larger population? If so, what population? Explain.

Answer 1

A. Yes since we can see that 200 students were selected at random. The specific population is the students enrolled at a large college in Alabama.

B. Yes

C. Since from the test conducted it was found that the average cholesterol level was significantly lower for the group who ate 5 or more apples a week, we can conclude that yes eating 5 or more apples a week lowers cholesterol.

D. Yes, since the test is statistically significant we can generalize this study results to s large population. The population could be all students of this age.