What is an estimated pooled variance?
A)the weighted average of the variances estimates
B)the variance of the difference between the sample means
C)the sum of the two variances estimates
D)the variance of the populations from which the samples were drawn

Question

Quizplus · Accepted Answer

The estimated pooled variance is the weighted average of the variances estimates of two or more independent samples. It is calculated by taking the sum of the products of the sample variances and their degrees of freedom, dividing it by the total degrees of freedom, which is the sum of the degrees of freedom of all the samples minus the number of samples. Therefore, option A is the correct answer.

What Is an Estimated Pooled Variance