Eighteen overweight volunteers weighed themselves before and after a two-week diet.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 individuals are measured before and after the diet, making the samples related or paired.

Eighteen Overweight Volunteers Weighed Themselves Before and After a Two-Week