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.

Question

Quizplus · Accepted Answer

The appropriate design is a related-samples t-test because the same group of seniors is measured twice, before and after the seminar, making the samples related or dependent on each other.

In a Study Involving Stress Among College Students, a Group