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a. What is the value of x ? b. What is the value of R? c. What are the UCL, and LCL, using 3ơ?

a. What is the value of x ? b. What is the value of R? c. What are the UCL, and LCL, using 3ơ?

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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s 6.7 is not answered, please answer S6.7

56.6 Sampling 4 pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results: .. Hour 1 2 3 4 5 6 7 8 9 10 11 12 2 3 4 5 X 3.25" 3.10 Day 1 3.22 3.39 3.07 2.86 3.05 2.65 3.02 2.85 2.83 2.97 R .71" 1.18 1.43 1.26 1.17 32 .53 1.13 .71 1.33 1.17 40 Hour 13 14 15 16 17 18 19 20 21 153.6 155.5 156.6 22 23 24 X 3.11" 2.83 3.12 2.84 2.86 2.74 3.41 2.89 2.65 3.28 a. What is the value of x ? b. What is the value of R? c. What are the UCL, and LCL, using 30? 2.94 2.64 Develop appropriate control charts and determine whether there is any cause for concern in the cutting process. Plot the information and look for patterns. P R .85" 1.31 1.06 50 1.43 1.29 1.61 ..V S6.7 Auto pistons at Yongpin Zhou's plant in Shanghai are pro- duced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: Mean (mm) 156.9 153.2 1.09 1.08 46 1.58 .97 Range (mm) 4.2 4.6 4.1 5.0 4.5
Transcribed Image Text:56.6 Sampling 4 pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results: .. Hour 1 2 3 4 5 6 7 8 9 10 11 12 2 3 4 5 X 3.25" 3.10 Day 1 3.22 3.39 3.07 2.86 3.05 2.65 3.02 2.85 2.83 2.97 R .71" 1.18 1.43 1.26 1.17 32 .53 1.13 .71 1.33 1.17 40 Hour 13 14 15 16 17 18 19 20 21 153.6 155.5 156.6 22 23 24 X 3.11" 2.83 3.12 2.84 2.86 2.74 3.41 2.89 2.65 3.28 a. What is the value of x ? b. What is the value of R? c. What are the UCL, and LCL, using 30? 2.94 2.64 Develop appropriate control charts and determine whether there is any cause for concern in the cutting process. Plot the information and look for patterns. P R .85" 1.31 1.06 50 1.43 1.29 1.61 ..V S6.7 Auto pistons at Yongpin Zhou's plant in Shanghai are pro- duced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: Mean (mm) 156.9 153.2 1.09 1.08 46 1.58 .97 Range (mm) 4.2 4.6 4.1 5.0 4.5
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