A process that is assumed to be in control with limits of 90 ± 2 had sample averages for the x-bar chart of the following: 87.1, 87, 87.2, 89, 90, 88.5, 89.5, and 88. Which of the following statement below are correct? Select one: a. None is correct b. Process mean is in-control c. Process mean is out-of-control d. Not enough information to determine
A process that is assumed to be in control with limits of 90 ± 2 had sample averages for the x-bar chart of the following: 87.1, 87, 87.2, 89, 90, 88.5, 89.5, and 88. Which of the following statement below are correct? Select one: a. None is correct b. Process mean is in-control c. Process mean is out-of-control d. Not enough information to determine
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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Transcribed Image Text:FACTORS FOR R CHARTS
Number of
Factor for
Observations
in Subgroup,
x Chart,
A2
Lower
Control Limit,
Upper
Control Limit,
D3
Da
1.88
3.27
1.02
2.57
0.73
0.58
2.28
4
2.11
5
0.48
2.00
0.42
0.08
1.92
0.37
0.14
1.86
8
0.34
0.18
1.82
0.31
0.22
1.78
10
0.29
0.26
1.74
11
0.27
0.28
1.72
12
0.31
1.69
0.25
13
0.24
0.33
1.67
14
0.22
0.35
1.65
15
0.36
1.64
0.21
16
0.38
1.62
17
0.20
0.39
1.61
18
0.19
0.40
1.60
19
0.19
0.41
1.59
20
0.18
23
67
Transcribed Image Text:A process that is assumed to be in control with limits of 90 + 2 had sample averages for the x-bar chart of the
following: 87.1, 87, 87.2, 89, 90, 88.5, 89.5, and 88. Which of the following statement below are correct?
Select one:
a. None is correct
O b. Process mean is in-control
c. Process mean is out-of-control
O d. Not enough information to determine
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