If I want to test for a difference in the sample means between two metric variables from the same sample group, I could use a paired samples t-test.

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Quizplus · Accepted Answer

A paired samples t-test is appropriate when comparing the means of two related or paired variables, such as before and after measurements in the same individuals or matched pairs. It is not appropriate for comparing two different variables from the same sample group. In this case, an independent samples t-test would be more appropriate.

If I Want to Test for a Difference in the Sample