If a null hypothesis is rejected it means
A) the treatment causes significant differences.
B) there are no differences between treatments.
C) any differences between groups are due to sampling error.
D) the differences found between groups are not due to chance.

Question

Quizplus · Accepted Answer

If a null hypothesis is rejected, it means that the differences found between groups are not due to chance. This suggests that there may be other factors, such as the treatment, that are causing the significant differences. Option A is incorrect because it suggests that the treatment causes significant differences without acknowledging that the null hypothesis has been rejected. Option B is incorrect because it suggests that there are no differences between treatments, which is not what rejecting the null hypothesis indicates. Option C is incorrect because it suggests that any differences between groups are due to sampling error, which may be true if the null hypothesis is not rejected, but if it is rejected, it means that the differences are not due to chance.

If a Null Hypothesis Is Rejected It Means