Question: A quality control inspector has taken four samples with five observation each. If the average range for the four samples is (0.4) ounces and the

A quality control inspector has taken four
A quality control inspector has taken four samples with five observation each. If the average range for the four samples is (0.4) ounces and the average means of the observation is (19.8) ounces. Use X-bar chart to identify the UCL

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