Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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The postmaster of a small western town receives a certain number of complaints each day about
mail delivery. Determine three-sigma control limits using the following data. Is the process in
control?
DAY
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Number of complaints 4 10 14 8 9 6 5 12 13 7 6 4 2 10
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