Excelsior Skin Products plans to market a new product to treat a chronic skin rash known as Extreme B.As part of its product testing, researchers at the company want to determine whether the performance of the product differs for men and women. The table below shows the results of a test in which eight test subjects with the Extreme B rash, four men and four women, were randomly selected and treated with the product. The time (in hours) before the rash was no longer visible was recorded for each subject.

a. Use the t test described in Chapter 10 to test the null hypothesis that the average time until the rash disappears is the same for men and women. The significance level is .05. 

b. Use analysis of variance to test the hypothesis in part a and summarize your results in a proper ANOVA table. 

c. Compare your results in part b to your results in part a. What is the relationship between the t value and the F value here?

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