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

question 54

Multiple Choice

A researcher evaluates a treatment effect using a two-tailed hypothesis test with α = .05,and the decision is to reject the null hypothesis.If the researcher used the same sample and switched to a one-tailed test that is consistent with the direction found in initial two-tailed hypothesis test,what decision would be made?

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

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Definitions:

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