Question: Three samples have been taken from a machine that is used to fill 3-liter bottles of water, where each sample consists of 10 observations. Sample
Three samples have been taken from a machine that is used to fill 3-liter bottles of water, where each sample consists of 10 observations. Sample means and ranges are given in the table below.
| Sample | Mean (liters) | Range (liters) |
| 1 | 3.012 | 0.023 |
| 2 | 3.010 | 0.011 |
| 3 | 2.987 | 0.042 |
What is the upper control limit (UCL) for the mean chart?
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