On the basis of a pretest on knowledge of foreign languages,each subject in the 9:00 class was matched with a subject in the 10:30 class.The 9:00 class used a participant approach to the study of Latin,and the 10:30 class used the Hiffendorf method.At the end of the term,the same Latin test was given to both classes.The appropriate design for testing the significance of the difference between the means is
A)one-sample t-test.
B)z-test.
C)related-samples t-test.
D)independent-samples t-test.

Question

Quizplus · Accepted Answer

The related-samples t-test is the appropriate design when pretest scores are matched or paired with posttest scores. In this case, each subject in the 9:00 class was matched with a subject in the 10:30 class based on their pretest scores. Therefore, the related-samples t-test would be the best choice to test the significance of the difference between the means of the two classes' performance on the posttest.

On the Basis of a Pretest on Knowledge of Foreign