The variance of a distribution of differences between means is equal to
A)the difference between the variances of the two distributions of means.
B)the sum of the variances of the two distributions of means.
C)the difference between the two estimated population variances.
D)the sum of the two estimated population variances.

Question

Quizplus · Accepted Answer

The variance of a distribution of differences between means is equal to the sum of the variances of the two distributions of means. This is because when calculating the variance of the difference between two independent variables, you add their variances.

The Variance of a Distribution of Differences Between Means Is