The procedure which produces a pooled weighted estimate of the sample variances combines the individual estimates in a manner which is ____.
A)proportional to their mean difference
B)unaffected by sample size
C)proportional to their degrees of freedom
D)proportional to the size of difference between the variance estimates

Question

Quizplus · Accepted Answer

The pooled weighted estimate of sample variances combines the individual estimates proportionally to their degrees of freedom. This is because variances tend to be more reliable when based on larger sample sizes, which correspond to higher degrees of freedom.

The Procedure Which Produces a Pooled Weighted Estimate of the Sample