critical region

(NL: kritieke gebied)

In the context of hypothesis tests, the critical region (also: rejection region) is the set of all possible values for the test statistic for which we will reject the null hypothesis.

Or, in other words, this is the set of all values for the test statistic for which the p-value is less than the significance level.

The values for which we do not reject the null hypothesis from the region of acceptance.