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Get Full Access to Statistics For Engineers And Scientists - 4 Edition - Chapter 2.5 - Problem 3e
Get Full Access to Statistics For Engineers And Scientists - 4 Edition - Chapter 2.5 - Problem 3e

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# The lifetime of a certain transistor in a certain

ISBN: 9780073401331 38

## Solution for problem 3E Chapter 2.5

Statistics for Engineers and Scientists | 4th Edition

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Problem 3E

The lifetime of a certain transistor in a certain application has mean 900 hours and standard deviation 30 hours. Find the mean and standard deviation of the length of time that four transistors will last.

Step-by-Step Solution:

Step 1 of  3

Here they mean and standard deviation of one transistor

Now we need to find  mean and standard deviation of four transistors

The mean of the transistor is  =900

The standard deviation of the transistor is =30

Step 2 of 3

Step 3 of 3

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