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# Answer: In Exercise 5.18, Y1 and Y2 denoted the lengths of life, in hundreds of hours ISBN: 9780495110811 47

## Solution for problem 5.81 Chapter 5

Mathematical Statistics with Applications | 7th Edition

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Problem 5.81

In Exercise 5.18, Y1 and Y2 denoted the lengths of life, in hundreds of hours, for components of types I and II, respectively, in an electronic system. The joint density of Y1 and Y2 is f (y1, y2) = (1/8)y1e(y1+y2)/2, y1 > 0, y2 > 0, 0, elsewhere. One way to measure the relative efficiency of the two components is to compute the ratio Y2/Y1. Find E(Y2/Y1). [Hint: In Exercise 5.61, we proved that Y1 and Y2 are independent.]

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##### ISBN: 9780495110811

This textbook survival guide was created for the textbook: Mathematical Statistics with Applications , edition: 7. The full step-by-step solution to problem: 5.81 from chapter: 5 was answered by , our top Statistics solution expert on 07/18/17, 08:07AM. Since the solution to 5.81 from 5 chapter was answered, more than 212 students have viewed the full step-by-step answer. Mathematical Statistics with Applications was written by and is associated to the ISBN: 9780495110811. This full solution covers the following key subjects: . This expansive textbook survival guide covers 32 chapters, and 3350 solutions. The answer to “In Exercise 5.18, Y1 and Y2 denoted the lengths of life, in hundreds of hours, for components of types I and II, respectively, in an electronic system. The joint density of Y1 and Y2 is f (y1, y2) = (1/8)y1e(y1+y2)/2, y1 > 0, y2 > 0, 0, elsewhere. One way to measure the relative efficiency of the two components is to compute the ratio Y2/Y1. Find E(Y2/Y1). [Hint: In Exercise 5.61, we proved that Y1 and Y2 are independent.]” is broken down into a number of easy to follow steps, and 79 words.

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