Which of the following hypotheses should be tested using an independent-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

An independent-samples t test is used to compare the means of two different groups. As such, hypothesis B, examining whether there is a difference in pretest score means between men and women, is the most appropriate for the test. Hypothesis A is a statement about a single group's posttest scores, not a comparison between groups. Hypothesis C is comparing individuals' pre and posttest scores, not comparing the means of different groups. Hypothesis D is examining correlation, not differences between means.

Which of the Following Hypotheses Should Be Tested Using an Independent-Samples