A Researcher Evaluates a Treatment Effect Using a Two-Tailed Hypothesis

Multiple Choice

A researcher evaluates a treatment effect using a two-tailed hypothesis test with  = .05,and the decision is to reject the null hypothesis.If the researcher switched to a one-tailed test using the same sample,what decision would be made?

A) Definitely reject the null hypothesis with  = .05 and maybe reject with  = .01
B) Definitely reject the null hypothesis with  = .05 and with  = .01
C) Definitely fail to reject the null hypothesis with either  = .05 or with  = .01
D) It is impossible to predict the outcome of the one-tailed test.