Kizspy | Question: 39
(Choose 1 answer)
(See picture)
A. 19
B. 18
C. 38
D. 39
E. None of the other choices is correct.
If we are testing for the difference between the means of 2 related populations with samples of n₁ = 20 and n₂ = 20, the number of degrees of freedom is equal to
