Q4) Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an x-bar and R-chart using these data. Is the process in control? Sample Mean Range 1 20.01 0.45 2 19.98 0.67 3 20.25 0.30 4 19.90 0.30 5 20.35 0.36 6 19.23 0.49 7 20.01 0.53 8 19.98 0.40 9 20.56 0.95 10 19.97 0.79
Q4) Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an x-bar and R-chart using these data. Is the process in control? Sample Mean Range 1 20.01 0.45 2 19.98 0.67 3 20.25 0.30 4 19.90 0.30 5 20.35 0.36 6 19.23 0.49 7 20.01 0.53 8 19.98 0.40 9 20.56 0.95 10 19.97 0.79
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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Q4) Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an x-bar and R-chart using these data. Is the process in control?
Sample |
Mean |
Range |
1 |
20.01 |
0.45 |
2 |
19.98 |
0.67 |
3 |
20.25 |
0.30 |
4 |
19.90 |
0.30 |
5 |
20.35 |
0.36 |
6 |
19.23 |
0.49 |
7 |
20.01 |
0.53 |
8 |
19.98 |
0.40 |
9 |
20.56 |
0.95 |
10 |
19.97 |
0.79 |
![TABLE 56.1
SAMPLE SIZE, n
2
3
4
5
6
7
8
9
10
12
Factors for Computing Control Chart Limits (3 sigma)
MEAN FACTOR, A₂
1.880
1.023
729
577
483
419
373
337
308
266
UPPER RANGE, D₂
3.268
2.574
2.282
2.115
2.004
1.924
1.864
1.816
1.777
1.716
LOWER RANGE, D,
0
0
0
0
0
0.076
0.136
0.184
0.223
0.284](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F39f60986-4bde-4b8a-8662-ba97d9dc4cff%2Fc225433d-ee81-41f5-a6f7-27e2b6a8e3ca%2Fslu9akq_processed.png&w=3840&q=75)
Transcribed Image Text:TABLE 56.1
SAMPLE SIZE, n
2
3
4
5
6
7
8
9
10
12
Factors for Computing Control Chart Limits (3 sigma)
MEAN FACTOR, A₂
1.880
1.023
729
577
483
419
373
337
308
266
UPPER RANGE, D₂
3.268
2.574
2.282
2.115
2.004
1.924
1.864
1.816
1.777
1.716
LOWER RANGE, D,
0
0
0
0
0
0.076
0.136
0.184
0.223
0.284
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