When conducting a hypothesis test about a single mean,reducing the level of significance ($\alpha$)will increase the size of the rejection region.

Name: When conducting a hypothesis test about a single mean,reducing the level of significance ($\alpha$)will increase the size of the rejection region.
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Reducing the level of significance (alpha) decreases the size of the rejection region, as it makes the criteria for rejecting the null hypothesis more stringent.

When Conducting a Hypothesis Test About a Single Mean,reducing the Level