If a null hypothesis is rejected at the 0.05 level of significance,it must be rejected at the 0.025 level.

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Rejecting a null hypothesis at the 0.05 level of significance means that the probability of observing the data if the null hypothesis were true is less than 5%. However, to reject at the 0.025 level, this probability must be less than 2.5%. Therefore, rejecting at a higher level (0.05) does not automatically imply rejection at a lower level (0.025).

If a Null Hypothesis Is Rejected at the 0