Question: 6. (a) In Problem 5 above find a 95% confidence interval for 2 1/2 2 (i.e., do not assume that 2 1 = 2 2

6.

(a) In Problem 5 above find a 95% confidence interval for σ2 1/σ2 2 (i.e., do not assume that σ2 1 = σ2 2 in this problem).

(b) Use part

(a) to test the assumption in Problem 5 of equal variances at the 5%

level of significance, that is test H0: σ2 1 = σ2 2 versus H1: σ2 1 = σ2 2.

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