If testing for the difference between the means of two related populations,with samples of sizes n₁= n₂= n,where the variance of the differences is unknown,what is the number of degrees of freedom? A)n - 1 B)2n - 1 C)2(n - 1) D)n - 2

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The number of degrees of freedom for a test involving the difference between means of two related populations with samples of the same size (n) and unknown variance is n - 1. This is because the degrees of freedom for a paired samples t-test (which is applicable in this scenario) is calculated as the number of pairs minus one.

If Testing for the Difference Between the Means of Two