Question: A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n=5) taken.
A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n=5) taken. The population process standard deviation, is 1.36.
| Samples | |||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 10 | 9 | 13 | 10 | 12 | 10 | 10 | 13 | 8 | 10 |
| 9 | 9 | 9 | 10 | 10 | 10 | 11 | 10 | 8 | 12 |
| 10 | 11 | 10 | 11 | 9 | 8 | 10 | 8 | 12 | 9 |
| 9 | 11 | 10 | 10 | 11 | 12 | 8 | 10 | 12 | 8 |
| 12 | 10 | 9 | 10 | 10 | 9 | 9 | 8 | 9 | 12 |
- What is
- If z = 3, what are the control limits for the mean chart?
- What are the control limits for the range chart?
- Is the process in control?
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