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

Question

Quizplus · Accepted Answer

Pooled variance is a method used in statistics to estimate the variance of two or more populations when the assumption of equal variances is made. It is calculated as the weighted average of the sample variances from each population, where the weights are the degrees of freedom of each sample. This approach is commonly used in t-tests and analysis of variance (ANOVA) when comparing group means.

What Is Pooled Variance