For a repeated-measures design,the sample mean difference is always located exactly in the center of the confidence interval estimate for the population mean difference.

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Quizplus · Accepted Answer

This is true. In a repeated-measures design, each subject is measured twice, which means that the sample mean difference is based on the within-subject differences. As a result, the confidence interval for the population mean difference will be centered around the sample mean difference.

For a Repeated-Measures Design,the Sample Mean Difference Is Always Located