If the critical region begins at Z (critical)=$\pm$2.56 and the test statistic is -2.50,we
A)fail to reject the null hypothesis.
B)reject the null hypothesis.
C)cannot make a decision because the test statistic is so close to the critical region.
D)change the alpha level.

Question

Quizplus · Accepted Answer

The test statistic of -2.50 falls within the critical region, which means it is more extreme than the critical value at the given alpha level. Therefore, we would fail to reject the null hypothesis.

If the Critical Region Begins at Z (Critical)= ±\pm± 256 and the Test Statistic Is -2

If the Critical Region Begins at Z (Critical)= $\pm$ 256 and the Test Statistic Is -2