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In Exercise 5-31, the monthly demand for MMR vaccine was

Applied Statistics and Probability for Engineers | 6th Edition | ISBN: 9781118539712 | Authors: Douglas C. Montgomery, George C. Runger ISBN: 9781118539712 55

Solution for problem 77E Chapter 5.4

Applied Statistics and Probability for Engineers | 6th Edition

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Applied Statistics and Probability for Engineers | 6th Edition | ISBN: 9781118539712 | Authors: Douglas C. Montgomery, George C. Runger

Applied Statistics and Probability for Engineers | 6th Edition

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5
Problem 77E

In Exercise 5-31, the monthly demand for MMR vaccine was assumed to be approximately normally distributed with a mean and standard deviation of 1.1 and 0.3 million doses, respectively. Suppose that the demands for different months are independent, and let Z denote the demand for a year (in millions of does). Determine the following:

Step-by-Step Solution:

Step 1 of 5</p>

Given that the monthly demand of MMr follows the normal distribution with mean 1.1 and standard deviation 0.3

Let X denote the monthly demand

Here

Let Z denote the yearly demand

Then Z=12X

Step 2 of 5</p>

a) We have to find mean, variance and the distribution of Z

Now mean(Z)=

                      =

                      =12(1.1)

                      =13.2

 Variance (Z)=

                     =144(0.3)2 

                     =12.96

Standard deviation (Z)=

                                    =3.6

Here X follows the normal distribution

then Z=12X also follows the normal distribution

Step 3 of 5</p>

b) We have to find

Now

                              =

                             =0.5

Hence =0.5

Step 4 of 5

Chapter 5.4, Problem 77E is Solved
Step 5 of 5

Textbook: Applied Statistics and Probability for Engineers
Edition: 6
Author: Douglas C. Montgomery, George C. Runger
ISBN: 9781118539712

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In Exercise 5-31, the monthly demand for MMR vaccine was

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