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Get Full Access to Statistics For Engineers And Scientists - 4 Edition - Chapter 4.12 - Problem 8e
Get Full Access to Statistics For Engineers And Scientists - 4 Edition - Chapter 4.12 - Problem 8e

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# Refer to Example 4.81 (page 310). In order to increase the ISBN: 9780073401331 38

## Solution for problem 8E Chapter 4.12

Statistics for Engineers and Scientists | 4th Edition

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Problem 8E

Refer to Example 4.81 (page 310). In order to increase the lifetime of the system, the engineers have a choice between replacing component A with one whose lifetime is distributed Exp(1/2), or replacing component B with one whose lifetime is distributed Exp(1/3).

a. Generate, by simulation, a large number (at least 1000) of system lifetimes under the assumption that component A is replaced.

b. Generate, by simulation, a large number (at least 1000) of system lifetimes under the assumption that component B is replaced.

c. If the goal is to maximize the mean system lifetime, which is the better choice? Explain.

d. If the goal is to minimize the probability that the system fails within a month, which is the better choice? Explain.

e. If the goal is to maximize the 10th percentile of the system lifetimes, which is the better choice? Explain.

Step-by-Step Solution:

Solution:

Step 1 of 4:

In order to increase the lifetime of the system, there is two choices. Replacing component A ( with one whose lifetime is distributed exp(1/2) , or replacing component  ( )with one whose lifetime is distributed exp(1/3). The system lifetime calculated as L= Max ( , ).

Step 2 of 4

Step 3 of 4

##### ISBN: 9780073401331

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