What Is the Argument for Using a One-Tailed Test When

question 89

Multiple Choice

What is the argument for using a one-tailed test when there is a clear basis for predicting a result in a given direction?

• A)The underlying mathematics of one-tailed tests are more accurate.
• B)If the result is opposite to the prediction, the researcher can still do a two-tailed test later.
• C)It is more conservative, in the sense that in using a one-tailed test it is harder to reject the null hypothesis.
• D)A particular theory is being tested, and if the results come out opposite to the theory, that adds no more information than if the result simply had not been significant.

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