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Develop the trial limits for an appropriate control chart.  What is the best estimate of the process capability?

Develop the trial limits for an appropriate control chart.  What is the best estimate of the process capability?

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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The following table gives the results of daily inspections of plastic parts manufactured in an injection molding process.

Date # Inspected # of Defective Units
Nov 2 531 25
3 1393 62
4 1422 61
5 1500 73
6 1250 46
7 2000 57
9 685 28
10 2385 89
11 2150 89
12 2150 58
13 2417 115
14 2459 105
16 2331 75
17 2009 81
18 2198 86
19 2271 67
20 1948 41
21 2150 77
23 1700 49
24 2214 68
25 2394 82
26 1197 56
27 850 27
28 848 30
30 850 33

 

Develop the trial limits for an appropriate control chart.  What is the best estimate of the process capability?

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