If the null hypothesis is true for a paired-samples t test, the mean of the distribution of mean differences is 0.

Name: If the null hypothesis is true for a paired-samples t test, the mean of the distribution of mean differences is 0.
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Quizplus · Accepted Answer

This is true because the null hypothesis assumes that there is no significant difference between the two sets of measurements being compared, which means that the mean difference between them is zero.

If the Null Hypothesis Is True for a Paired-Samples T