In testing the difference between two population means using two independent samples,we use the pooled variance in estimating the standard error of the sampling distribution of the sample mean difference if the populations are normal with equal variances.

Question

In testing the difference between two population means using two independent samples,we use the pooled variance in estimating the standard error of the sampling distribution of the sample mean difference  if the populations are normal with equal variances.

Quizplus · Accepted Answer

The statement is true. In two-sample t-tests, the pooled variance is used to estimate the standard error of the difference between the means. This assumes that the two populations have the same variance.

In Testing the Difference Between Two Population Means Using Two