Let’s consider Exercise 10.28 on the Stroop test and posthypnotic suggestion. When we conduct a one-tailed test instead of a two-tailed test, there are small changes in steps 2 and 4 of hypothesis testing.

a. Conduct step 2 of hypothesis testing—stating the null and research hypotheses in words and in symbols—for a one-tailed test.

b. Conduct step 4 of hypothesis testing—determining the critical value and drawing the curve—for a onetailed test.

c. Conduct step 6 of hypothesis testing—making a decision—for a one-tailed test.

d. Under which circumstance—a one-tailed or a twotailed test—is it easier to reject the null hypothesis?

Explain.

e. If it becomes easier to reject the null hypothesis under one type of test (one-tailed versus two-tailed), does this mean that there is a bigger mean difference between the samples? Explain.