Question: The process makes precision spacers that are normally 1 0 0 millimeters thick. The process operates on a two - shift basis and appears to

The process makes precision spacers that are normally 100 millimeters thick. The process operates on a two-shift basis and appears to be quite stable. Fifty spacers per hour are produced. To develop a control chart for the process, we measure the first 5 spacers produced after 9 am,1 pm,5 pm, and 9 pm. We do this for 3 days, for a total of 1 data points in 12 subgroups. The following table represents the results of our measurement:

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