If the mean of population A is significantly different from 20, but the mean of group B is not significantly different from 20, then the mean of the two population are different from one another.

Question

Quizplus · Accepted Answer

The statement does not provide enough information to conclude that the means of populations A and B are different from each other. The lack of significant difference from 20 in group B's mean does not inherently imply a difference between the means of populations A and B, as both could still be close to or equal to 20 but with different variances or sample sizes affecting the significance of their deviation from 20.

If the Mean of Population a Is Significantly Different from 20