When the alpha level is .05,a result is defined as being "unexpected" if the probability of obtaining that result,assuming the null hypothesis is true,is:
A)less than .95
B)greater than .95
C)less than .05
D)greater than .05

Question

Quizplus · Accepted Answer

The alpha level represents the cutoff point for rejecting the null hypothesis. An unexpected result would be one that is unlikely to occur by chance if the null hypothesis is true. Therefore, the probability of obtaining such a result would have to be low, which means the answer cannot be A or B (both of which indicate a probability greater than .95). It also cannot be D, which indicates a probability greater than the alpha level itself. The only option left is C, which indicates a probability of less than .05, which would make the result unexpected according to the typical criteria for null hypothesis testing.

When the Alpha Level Is