Question

A medical researcher conducted a study to investigate whether exercising can lower cholesterol. From a sample of 150 adult volunteers with high cholesterol, 75 were randomly assigned to pursue an exercise program that includes daily jogging and strength training. The remaining 75 were asked to refrain from vigorous activity. At the end of six months, the people in the exercise group substantially reduced their cholesterol, while the people in the no-exercise group did not experience a reduction. Which of the following is the most appropriate conclusion?

A) There is evidence that exercise causes a reduction in cholesterol, and the conclusion can be generalized to all adults.
B) There is evidence that exercise causes a reduction in cholesterol, and the conclusion can be generalized to all adults who exercise.
C) There is evidence that exercise causes a reduction in cholesterol, and the conclusion can be generalized to adults similar to those study volunteers with high cholesterol.
D) Although cause-and-effect cannot be established, there is an association between exercising and a reduction in cholesterol for the population of all adults.
E) Although cause-and-effect cannot be established, there is an association between exercising and a reduction in cholesterol for the population of all adults who exercise.

Answer 1

C) There is evidence that exercise causes a reduction in cholesterol, and the conclusion can be generalized to adults similar to those study volunteers with high cholesterol.

Step-by-step explanation:

The study was conducted on a sample of 150 adult volunteers with high cholesterol, and 75 of them were assigned to the exercise group while the other 75 were assigned to the no-exercise group.

At the end of six months, the people in the exercise group had a substantial reduction in cholesterol while the people in the no-exercise group did not experience any reduction.

Since the study was conducted on a sample of adults with high cholesterol, the conclusion can be generalized to adults similar to those in the study.

However, it is important to note that causality cannot be established through this study.

Hope this helps!