Answered: An inspector counted the number of…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Question

An inspector counted the number of defective monthly billing statements of a telephone
company in each of 20 samples. Using the following information, construct a control chart
that will describe 99.74 percent of the chance variation in the process when the process is in
control. Each sample contained 100 statements.
Sample Number of
Defectives
Sample Number of
Defectives
Sample Number of
Defectives
Sample Number of
Defectives
1 7 6 11 11 8 16 10
2 10 7 10 12 12 17 8
3 12 8 18 13 9 18 12
4 4 9 13 14 10 19 10
5 9 10 10 15 16 20 21
220

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