Why is it necessary to use pooled variance rather than variance when conducting an independent-samples t test?
A) There are two samples.
B) It is a first step to calculating mean differences.
C) We need to remove the effects of sample size.
D) We need to multiply this value by 100.

Question

Quizplus · Accepted Answer

When conducting an independent-samples t test, we are comparing the means of two separate samples. These samples may have different variances, so using the pooled variance takes into account the variability of both samples and provides a more accurate estimate of the population variance.

Why Is It Necessary to Use Pooled Variance Rather Than