Which of the following hypotheses should be tested using a paired-samples t test?
A) The average posttest score was 78.
B) Women had the same average pretest score as men.
C) On average, persons' posttest scores were the same as their pretest scores.
D) Pretest and posttest scores were not correlated.

Question

Quizplus · Accepted Answer

A paired-samples t test is appropriate when comparing the means of two related samples (pretest and posttest scores in this case), and the hypothesis that their means are equal is being tested. Option A does not involve a comparison with a related sample, option B involves comparing two groups (men and women), and option D involves testing a correlation rather than a mean difference.

Which of the Following Hypotheses Should Be Tested Using a Paired-Samples