(a) Construct a two-sided 100(1 — a)% confidence interval for the difference µx − µy. (b) We want to obtain a 90% confidence interval for the difference between true average cable strengths made by Company X and by Company Y. Suppose cable strength is normally distributed for both types of cables with ox = 70 and oy = 50. If we can make n+m= 6000 observations, how many of these should be on Company X cable if we want to minimize the width of the interval?

(a) Construct a two-sided 100(1 — a)% confidence interval for the difference µx − µy. (b) We want to obtain a 90% confidence interval for the difference between true average cable strengths made by Company X and by Company Y. Suppose cable strength is normally distributed for both types of cables with ox = 70 and oy = 50. If we can make n+m= 6000 observations, how many of these should be on Company X cable if we want to minimize the width of the interval?

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter1: Functions

Section1.2: The Least Square Line

Problem 4E

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