Question: The amount of mineral water filled in 2 liter bottles by
The amount of mineral water filled in 2-liter bottles by an automatic bottling machine is monitored using a control chart. The actual contents of random samples of 4 bottles collected on 8 different days are tabulated below. Draw X-bar, R, and s charts. Is the process in control? If it is not, remove the sample that is out of control, and redraw the charts.
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