Definitions for

**"Critical value"**the value of a computed statistic used as a threshold to decide whether the null hypothesis will be rejected.

A value taken from a statistical table. It serves as the criterion for determining whether the corresponding data-based statistic is large enough to be considered evidence against the null hypothesis.

The value of the test statistic beyond which we would reject the null hypothesis. The critical value is set so that the probability that the test statistic is beyond the critical value is at most equal to the significance level if the null hypothesis be true.

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