A null hypothesis is rejected when
A) the differences are due to sampling error.
B) the probability of finding a difference that large if the population means are equal is very low.
C) the probability of finding a difference that large if the population means are equal is very high.
D) the distribution is not normal.

Question

Quizplus · Accepted Answer

The rejection of a null hypothesis is based on the probability of finding a difference that large if the population means are equal, also known as the p-value. A p-value of less than 0.05 (or whatever level of significance is chosen) indicates that the probability of obtaining the observed difference due to chance is very low, thus leading to the rejection of the null hypothesis.

A Null Hypothesis Is Rejected When