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

Question

Quizplus · Accepted Answer

The number of degrees of freedom for a two-sample t-test is calculated using the formula:

df = (n1-1) + (n2-1)

where n1 and n2 are the sample sizes for the two populations being compared.

Substituting the given values, we get:

df = (20-1) + (20-1) = 38

Therefore, the correct answer is C) 38.

If You Are Testing for the Difference Between the Means