Question: A t-test is called non-directional if the experimenter: 1.Specifies the mean difference will be positive. 2.Specifies the mean difference will be negative. 3.Does not specify

A t-test is called non-directional if the experimenter:

1.Specifies the mean difference will be positive.

2.Specifies the mean difference will be negative.

3.Does not specify whether the mean difference will be positive or negative.

4.Does not specify an alpha level.

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