In estimating a confidence interval for the difference in two means,when the samples are independent and the standard deviations are unknown,it can be acceptable for there to be small violations of the assumptions of normality and equal variances,especially when the sample sizes are equal.

Question

Quizplus · Accepted Answer

When the sample sizes are equal, even small violations of the assumptions of normality and equal variances are acceptable for estimating a confidence interval for the difference in two means. However, the larger the sample sizes, the more important it is to meet these assumptions.

In Estimating a Confidence Interval for the Difference in Two