When is a two-tailed test used?
A)When no relationship is predicted
B)When a relationship is predicted and the direction in which the scores will change is predicted
C)When the demonstrated relationship is predicted
D)When a relationship is predicted without stating the direction in which the scores will change

Question

Quizplus · Accepted Answer

A two-tailed test is used when a relationship is predicted without stating the direction in which the scores will change. In this case, the researcher is interested in determining whether there is a significant difference between two groups, but does not have any prior expectations about the direction of the difference. Therefore, a two-tailed test is appropriate because it tests for the possibility of a difference in either direction.

When Is a Two-Tailed Test Used