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 millimeters thick. The process operates on a twoshift 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 spacers produced after am pm pm and pm We do this for days, for a total of data points in subgroups. The following table represents the results of our measurement:
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