Question: Consider the foam data in Exercise 10-18. Construct the following: (a) A 90% two-sided confidence interval on 2/1 2/2 (b) A 95% two-sided confidence interval

Consider the foam data in Exercise 10-18. Construct the following:
(a) A 90% two-sided confidence interval on σ2/1 σ2/2
(b) A 95% two-sided confidence interval on σ2/1 σ2/2. Comment on the comparison of the width of this interval with the width of the interval in part (a).
(c) A 90% lower-confidence bound on σ1/ σ2.

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