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Sampling four pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results: Hour
Sampling four pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results:
Hour | x-bar | R | Hour | x-bar | R |
1 | 3.11 cm | 0.85 cm | 13 | 3.25 cm | 0.71 cm |
2 | 2.83 | 1.31 | 14 | 3.1 | 1.18 |
3 | 3.12 | 1.06 | 15 | 3.22 | 1.43 |
4 | 2.84 | 0.5 | 16 | 3.39 | 1.26 |
5 | 2.86 | 1.43 | 17 | 3.07 | 1.17 |
6 | 2.74 | 1.29 | 18 | 2.86 | 0.32 |
7 | 3.41 | 1.61 | 19 | 3.05 | 0.53 |
8 | 2.89 | 1.09 | 20 | 2.65 | 1.13 |
9 | 2.65 | 1.08 | 21 | 3.02 | 0.71 |
10 | 3.28 | 0.46 | 22 | 2.85 | 1.33 |
11 | 2.94 | 1.58 | 23 | 2.83 | 1.17 |
12 | 2.64 | 0.97 | 24 | 2.97 | 0.4 |
Develop appropriate control charts and determine whether there is any cause for concern in the cutting process. Plot the information and look for patterns
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