Construct a 3-sigma control chart (z information. 8.) A tire manufacturer has been concerned about the number of defective tires found recently. In order to evaluate the true magnitude of the problem, a produc- tion manager selected 10 random samples of 20 units each for inspection. The number of defective tires found in each sample are as follows: tion old Number Defective 1 Sample 1 4 8. 9. 10 1 (a) Develop a p-chart with a z = (b) Suppose that the next four samples selected had 6 33 and 4 defects. What conclusion can you make? U-learn University uses a c-chart to monitor student complaints per week. Complaints have been recorded over the past ten weeks. Develop 3-sigma control lim- its using the following data: 3. 3 21t r~O 3 2345 670

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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Construct a 3-sigma control chart (z
information.
8.) A tire manufacturer has been concerned about the
number of defective tires found recently. In order to
evaluate the true magnitude of the problem, a produc-
tion manager selected 10 random samples of 20 units
each for inspection. The number of defective tires
found in each sample are as follows:
tion
old
Number Defective
1
Sample
1
4
8.
9.
10
1
(a) Develop a p-chart with a z =
(b) Suppose that the next four samples selected had 6
33 and 4 defects. What conclusion can you make?
U-learn University uses a c-chart to monitor student
complaints per week. Complaints have been recorded
over the past ten weeks. Develop 3-sigma control lim-
its using the following data:
3.
3 21t r~O 3
2345 670
Transcribed Image Text:Construct a 3-sigma control chart (z information. 8.) A tire manufacturer has been concerned about the number of defective tires found recently. In order to evaluate the true magnitude of the problem, a produc- tion manager selected 10 random samples of 20 units each for inspection. The number of defective tires found in each sample are as follows: tion old Number Defective 1 Sample 1 4 8. 9. 10 1 (a) Develop a p-chart with a z = (b) Suppose that the next four samples selected had 6 33 and 4 defects. What conclusion can you make? U-learn University uses a c-chart to monitor student complaints per week. Complaints have been recorded over the past ten weeks. Develop 3-sigma control lim- its using the following data: 3. 3 21t r~O 3 2345 670
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