When testing for the difference between the means of two independent populations,with samples of sizes n₁and n₂,where the population variances are unknown but assumed to be equal,what is the number of degrees of freedom? A)n - 1 B)n₁ + n₂ - 1 C)n₁ + n₂ - 2 D)n - 2

Question

Quizplus · Accepted Answer

When comparing the means of two independent populations with samples of equal size and assuming equal variances, we use the t-test with (n1 + n2 - 2) degrees of freedom. Therefore, the number of degrees of freedom is (n₁ + n₂ - 2).

When Testing for the Difference Between the Means of Two