The statement, "It is hypothesized that participants in a stress condition will perform in a significantly different manner than participants in a control group on a series of memory tasks" best illustrates a:
A) one-tailed test.
B) two-tailed test.
C) null hypothesis.
D) z test.

Question

Quizplus · Accepted Answer

This statement suggests a comparison without specifying the direction of difference (better or worse), which is characteristic of a two-tailed test. A two-tailed test is used when the research hypothesis does not predict the direction of the effect, just that there will be a difference.

The Statement, "It Is Hypothesized That Participants in a Stress