# Question

The simulation study described in Section 6.3 evaluated the effect of heavy-tailed and skewed distributions on the level of significance and power of the t test and Wilcoxon rank sum test. Examine the results displayed in Table 6.13, and then answer the following questions.

a. What has a greater effect, if any, on the level of significance of the t test, skewness or heavy-tailness?

b. What has a greater effect, if any, on the level of significance of the Wilcoxon rank sum test, skewness or heavy-tailness?

a. What has a greater effect, if any, on the level of significance of the t test, skewness or heavy-tailness?

b. What has a greater effect, if any, on the level of significance of the Wilcoxon rank sum test, skewness or heavy-tailness?

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