In a two-tailed hypothesis test the area in each tail of the rejection region is equal to α.

Name: In a two-tailed hypothesis test the area in each tail of the rejection region is equal to α.
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In a two-tailed hypothesis test, each tail of the rejection region has an area equal to α/2. This is because the rejection region is split between the two tails, and the total area of the rejection region must add up to α.

In a Two-Tailed Hypothesis Test the Area in Each Tail