In a Study Involving Stress Among College Students, a Group

Multiple Choice

In a study involving stress among college students, a group of seniors are asked to complete a stress survey.After a two-hour seminar on relaxation methods, they are asked to complete the stress survey again.The appropriate design for testing the significance of the difference between the means is

A) related-samples t-test.
B) independent-samples t-test.
C) one-sample t-test.
D) z-test.