what-is-the-role-of-the-pooled-standard-deviation-in-an-equal-variance-t-test

Question

What is the role of the pooled standard deviation in an equal variance t-test?

Accepted Answer

It combines the variances of two samples to provide a single estimate of variance.

Answer

It determines the mode of the combined samples.

Answer

It calculates the median of the combined samples.

Answer

It measures the difference between the means of two samples.