7. PCDrives has a statistically in-control manufacturing process that is normally distributed. Samplemeans and ranges for 15 samples of size 5 can be found in the Problems Data workbook. Determineprocess capability indexes by estimating the standard deviation using formula (8.34). If thespecifications are 70 ± 25, what percentage will be out of specification? PCDrives Sample x-bar R 1 77.4 18.3 2 60.2 20.1 3 63.5 22.6 4 64.0 27.5 5 58.4 15.3 6 74.4 17.9 7 70.8 26.8 8 74.6 30.6 9 77.3 19.2 10 65.7 14.6 11 63.4 24.5 12 76.6 21.7 13 71.7 25.5 14 70.9 29.7 15 59.6 14.5
7. PCDrives has a statistically in-control manufacturing process that is normally distributed. Samplemeans and ranges for 15 samples of size 5 can be found in the Problems Data workbook. Determineprocess capability indexes by estimating the standard deviation using formula (8.34). If thespecifications are 70 ± 25, what percentage will be out of specification? PCDrives Sample x-bar R 1 77.4 18.3 2 60.2 20.1 3 63.5 22.6 4 64.0 27.5 5 58.4 15.3 6 74.4 17.9 7 70.8 26.8 8 74.6 30.6 9 77.3 19.2 10 65.7 14.6 11 63.4 24.5 12 76.6 21.7 13 71.7 25.5 14 70.9 29.7 15 59.6 14.5
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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7. PCDrives has a statistically in-control manufacturing process that is
means and ranges for 15
process capability indexes by estimating the standard deviation using formula (8.34). If the
specifications are 70 ± 25, what percentage will be out of specification?
| PCDrives | |||
| Sample | x-bar | R | |
| 1 | 77.4 | 18.3 | |
| 2 | 60.2 | 20.1 | |
| 3 | 63.5 | 22.6 | |
| 4 | 64.0 | 27.5 | |
| 5 | 58.4 | 15.3 | |
| 6 | 74.4 | 17.9 | |
| 7 | 70.8 | 26.8 | |
| 8 | 74.6 | 30.6 | |
| 9 | 77.3 | 19.2 | |
| 10 | 65.7 | 14.6 | |
| 11 | 63.4 | 24.5 | |
| 12 | 76.6 | 21.7 | |
| 13 | 71.7 | 25.5 | |
| 14 | 70.9 | 29.7 | |
| 15 | 59.6 | 14.5 | |
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