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SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE 1 7 11 18 21 17 2 5 12 5 22 12 3 19 13 16 23 4 10 14 4 24 7 11 15 11 25 13 8 16 8 26 10 7 12 17 12 27 14 8 9 18 4 28 6 19 29 12 10 13 20 16 30 3

SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE 1 7 11 18 21 17 2 5 12 5 22 12 3 19 13 16 23 4 10 14 4 24 7 11 15 11 25 13 8 16 8 26 10 7 12 17 12 27 14 8 9 18 4 28 6 19 29 12 10 13 20 16 30 3

Practical Management Science
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

Five data entry operators work at the data process-
ing department of the Birmingham Bank. Each day for 30 days,

the number of defective records in a sample of 250 records typed
by these operators has been noted, as follows:

 

a) Establish 3s upper and lower control limits.
b) Why can the lower control limit not be a negative number?

c) The industry standards for the upper and lower control lim-
its are 0.10 and 0.01, respectively. What does this imply about

Birmingham Bank’s own standards?

SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE 1 7 11 18 21 17 2 5 12 5 22 12 3 19 13 16 23 4 10 14 4 24 7 11 15 11 25 13 8 16 8 26 10 7 12 17 12 27 14 8 9 18 4 28 6 19 29 12 10 13 20 16 30 3
Transcribed Image Text:SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE SAMPLE NO. NO. DEFECTIVE 1 7 11 18 21 17 2 5 12 5 22 12 3 19 13 16 23 4 10 14 4 24 7 11 15 11 25 13 8 16 8 26 10 7 12 17 12 27 14 8 9 18 4 28 6 19 29 12 10 13 20 16 30 3
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