Ten samples of size four were taken from a process, and their weights measured. The sample averages
Question: Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an X-bar and R-chart using these data. Is the process in control?
| Sample | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Mean | 20.01 | 19.98 | 20.25 | 19.9 | 20.35 | 19.23 | 20.01 | 19.98 | 20.56 | 19.97 |
| Range | 0.45 | 0.67 | 0.3 | 0.3 | 0.36 | 0.49 | 0.53 | 0.4 | 0.95 | 0.79 |
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Solution: The solution consists of 3 pages
Deliverables: Word Document
Deliverables: Word Document
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