In estimating the difference between two population means, if a 90% confidence interval estimate includes zero, then we can conclude that there is a 90% chance that the difference between the two population means is zero.

Question

Quizplus · Accepted Answer

The statement is incorrect. A confidence interval estimate that includes zero means that there is not enough evidence to support a difference between the two population means at the given level of confidence. It does not mean that there is a chance of zero difference.

In Estimating the Difference Between Two Population Means, If a 90