Both the equal-variances and unequal variances test statistic and confidence interval estimator of require that the two populations be normally distributed.

Question

Both the equal-variances and unequal variances test statistic and confidence interval estimator of  require that the two populations be normally distributed.

Quizplus · Accepted Answer

Both the equal-variances and unequal variances test statistic and confidence interval estimator assume that the two populations being compared are normally distributed. This assumption is often checked through normal probability plots or other diagnostic tests.

Both the Equal-Variances and Unequal Variances Test Statistic and Confidence