Question: Why do researchers sometimes use two-tailed (non-directional) hypothesis testing methods when their prediction is actually directional? We do not always have enough theoretical justification to

Why do researchers sometimes use two-tailed (non-directional) hypothesis testing methods when their prediction is actually directional? We do not always have enough theoretical justification to be sure of a specific direction of an effect Using two-tails results in more conservative critical values Both A & B are correct Neither A nor B are correct

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