In testing for differences between the means of two related populations where the variance of the differences is unknown, the degrees of freedom are
A) n - 1.
B) n₁ + n₂ - 1.
C) n₁ + n₂ - 2.
D) n - 2.

Question

Quizplus · Accepted Answer

When testing for differences between the means of two related populations (paired samples), the degrees of freedom are calculated as n - 1, where n is the number of paired observations.

In Testing for Differences Between the Means of Two Related