On the Basis of a Pretest on Knowledge of Foreign

Multiple Choice

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.