For a given null hypothesis and level of significance, the critical value for a two-tailed test is greater than the critical value for a one-tailed test.

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This is because in a two-tailed test, we are testing for the possibility of a significant difference in either direction, whereas in a one-tailed test we are only testing for significance in one specific direction. Therefore, the critical value for a two-tailed test must be more conservative (larger) to account for the possibility of significant differences in both directions.

For a Given Null Hypothesis and Level of Significance, the Critical