The assumptions for a related-samples t test are the same as those for the two-independent-sample t test.

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Quizplus · Accepted Answer

The assumptions for the related-samples t test are different from those for the two-independent-sample t test. The related-samples t test assumes that the differences between the paired observations have a normal distribution, while the two-independent-sample t test assumes that the populations from which the samples were drawn have normal distributions, and have equal variances.

The Assumptions for a Related-Samples T Test Are the Same