Which of the following comparisons would use a “paired t-test”? A- Fifteen retir

Question

Which of the following comparisons would use a “paired t-test”?

A- Fifteen retirees with diagnosed hypertension are assigned a program of diet, exercise, and meditation. A baseline measurement of blood pressure is taken before the program begins and again after 2 months. Was the program effective in reducing blood pressure of the participants after analyzing the mean blood pressure before the program compared to mean blood pressure after the program?

B- Comparing average GPA of male undergraduate students vs. average GPA of female undergraduate students

C- Comparing average age of juniors vs. average age of seniors.

D- Comapring the average GPA of economics majors, biology majors, and computer science majors.

Explanation / Answer

Correct answer is A because in a paired the test we always perform the tests on same sample. In all other cases the sample keeps changing

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