Question: Quantitative Question. Credit will be given only if appropriate calculations and steps are done. Two samples of four observations each have been taken, with actual
Quantitative Question. Credit will be given only if appropriate calculations and steps are done.
Two samples of four observations each have been taken, with actual measurements (in centimeters) shown below. Construct three-sigma mean and range charts. Is the process in control?
| Sample 1 | Sample 2 | |
| Observation 1 | 30 | 29 |
| Observation 2 | 29 | 30 |
| Observation 3 | 27 | 32 |
| Observation 4 | 32 | 29 |
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