You are thinking of employing a t procedure to test hypotheses about the mean of a population using a significance level of 0.05. You suspect the distribution of the population is not Normal and may be moderately skewed. Which of the following statements is correct?

Question

Quizplus · Accepted Answer

The t procedure can be used for moderately skewed distributions, as long as the sample size is large enough (usually considered to be at least 30, but 40 or more is even better). The t procedure is robust to non-Normality for testing hypotheses as well as constructing confidence intervals. Therefore, option A and C are incorrect. Option D is also incorrect because t procedures are actually robust to non-Normality for testing hypotheses as well.

You Are Thinking of Employing a T Procedure to Test