If we are testing for the difference between the means of 2 independent populations presumes equal variances with samples of n₁ = 20 and n₂ = 20, the number of degrees of freedom is equal to A) 39. B) 38. C) 19. D) 18.

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Quizplus · Accepted Answer

When testing the difference between means of two independent populations with equal variances, the degrees of freedom is calculated as n1 + n2 - 2, which is 20 + 20 - 2 = 38.

If We Are Testing for the Difference Between the Means