If the variances of the two populations are equal, it is appropriate to use the "pooled" formula to determine the t statistic for the hypothesis test of the difference in the two population means.

Question

Quizplus · Accepted Answer

When the variances of the two populations are equal, it is appropriate to use the pooled formula to determine the t statistic for the hypothesis test of the difference in the two population means. This involves combining the sample variances and degrees of freedom using a weighted average to calculate the pooled variance, which is then used to calculate the standard error of the difference between means. This pooled standard error is used in the t statistic formula, which assumes equal variances in the two populations.

If the Variances of the Two Populations Are Equal, It