The region or area of rejection defines the location of all values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote.

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This statement is true. The region of rejection is the area beyond the critical value(s) determined by the level of significance (alpha) and the degrees of freedom. It represents the values that are unlikely to occur by chance if the null hypothesis is true. Therefore, if the test statistic falls within the region of rejection, we reject the null hypothesis in favor of the alternative hypothesis.

The Region or Area of Rejection Defines the Location of All