Question: Consider the etch rate data in Exercise 10-19. (a) Test the hypothesis H0: 2 1 2 2 against H1: 2 1 2 2 using

Consider the etch rate data in Exercise 10-19.

(a) Test the hypothesis H0: 2 1 2 2 against H1: 2 1 2 2

using 0.05, and draw conclusions.

(b) Suppose that if one population variance is twice as large as the other, we want to detect this with probability at least 0.90 (using 0.05). Are the sample sizes n1 n2 10 adequate?

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