Question: In a control chart application, we have found that the grand average over all past samples of size 6 is = 3 0 and =

In a control chart application, we have found that the grand average over all past samples of size 6 is =30 and =6. a. Setup xbar and R control charts for this application. b. The following measurements are taken: 38,35,27,30,33, and 32. Is the process still in control?

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