An assumption of the independent samples t-test is that the two groups being compared must not be dependent on each other.

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The assumption of the independent samples t-test is that the two groups being compared must be independent of each other. If the two groups are dependent, such as in a before-and-after study or a matched pairs design, a different test (such as the paired samples t-test) should be used.

An Assumption of the Independent Samples T-Test Is That the Two