Question: Given the following sample data, what would be the Upper and Lower +/- 3 Sigma Control Limits for the corresponding X-bar chart? Sample Obs X
Given the following sample data, what would be the Upper and Lower +/- 3 Sigma Control Limits for the corresponding X-bar chart?
| Sample | Obs X1 | Obs X2 | Obs X3 | Obs X4 | Obs X5 | Obs X6 |
| 1 | 36 | 20 | 32 | 28 | 21 | 40 |
| 2 | 31 | 38 | 35 | 38 | 33 | 32 |
| 3 | 33 | 28 | 36 | 31 | 25 | 25 |
| 4 | 38 | 25 | 32 | 40 | 29 | 39 |
| 5 | 38 | 30 | 28 | 30 | 31 | 31 |
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