Question: A control chart controls a manufacturing process. Measurements are taken while the process is operating one time each hour. At each hour five sample parts

A control chart controls a manufacturing process. Measurements are taken while the process is operating one time each hour. At each hour five sample parts are measured, and the results are recorded and plotted on a control chart. During the last five hours the following data was observed for X bar and R. The upper control limit for X bar values is 142 and the lower control limit is

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