The process to check for a change in the process average

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Design an x-chart to control this process, within= 4 and control limits set at three sigma’s from the center line. The frequency should be sample four and then skip four. Thus, your sample would be for minutes 1{4, the second would be for minutes 9{12, and so on. When would you stop the process to check for a change in the process average?

Reference no: EM131028886

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