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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