A process considered to be in control measures an ingredient in ounces. A quality inspector took 10 samples, each with 5 observations as follows: Observations Samples 1 2. 3 4 1 10 9. 10 9. 12 11 11 10 3\ 13 9. 10 10 4. 10 10 11 10 10 5. 12 10 9. 11 10 6. 10 10 8 12 7. 10 11 10 8 9. 8. 13 10 8 10 8 6. 8 8. 12 12 9 10 10 12 8. 12 a) Using this information, obtain three-sigma (i.e., z=3) control limits for a mean control chart and control limits for a range chart, respectively. It is known from previous experience that the standard deviation of the process is 1.36. b) Discuss whether the process is in control or not.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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A process considered to be in control measures an ingredient in ounces. A quality inspector took 10
samples, each with 5 observations as follows:
Observations
Samples
3
4.
9.
10
12
9.
11
11
10
3.
13
9.
10
10
4.
10
10
11
10
10
5.
12
10
11
10
10
10
8
12
9.
10
11
10
8.
9
8.
13
10
8
10
8.
6.
8.
8,
12
12
6.
10
10
12
9.
8
12
a) Using this information, obtain three-sigma (i.e., z=3) control limits for a mean control chart and
control limits for a range chart, respectively. It is known from previous experience that the standard
deviation of the process is 1.36.
b) Discuss whether the process is in control or not.
ASUS VivoBook
100
Transcribed Image Text:A process considered to be in control measures an ingredient in ounces. A quality inspector took 10 samples, each with 5 observations as follows: Observations Samples 3 4. 9. 10 12 9. 11 11 10 3. 13 9. 10 10 4. 10 10 11 10 10 5. 12 10 11 10 10 10 8 12 9. 10 11 10 8. 9 8. 13 10 8 10 8. 6. 8. 8, 12 12 6. 10 10 12 9. 8 12 a) Using this information, obtain three-sigma (i.e., z=3) control limits for a mean control chart and control limits for a range chart, respectively. It is known from previous experience that the standard deviation of the process is 1.36. b) Discuss whether the process is in control or not. ASUS VivoBook 100
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