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Sample # Hardness Sample # Hardness Sample # Hardness 1 72.6 8 72.8 15 56.8 2 65 9 76.6 16 67.2 3 57.2 10 61
| Sample # | Hardness | Sample # | Hardness | Sample # | Hardness |
| 1 | 72.6 | 8 | 72.8 | 15 | 56.8 |
| 2 | 65 | 9 | 76.6 | 16 | 67.2 |
| 3 | 57.2 | 10 | 61 | 17 | 57 |
| 4 | 77.4 | 11 | 58.8 | 18 | 72.4 |
| 5 | 70.8 | 12 | 70.4 | 19 | 65.4 |
| 6 | 54.6 | 13 | 71.4 | 20 | 56.6 |
| 7 | 74.4 | 14 | 55 | ******* | ****** |
Draw an appropriate control chart and conclude whether the process is in control. 20 pts.
- Calculate the average hardness (X-bar) and range (R):
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Auditing A Business Risk Approach
Authors: Larry E. Rittenberg, Karla Johnstone, Audrey Gramling
7th Edition
0324663722, 978-0324663723
