Question: Set up a moving center line EWMA control chart for the concentration data in Exercise 10.20. Compare it to the residuals control chart in Exercise

Set up a moving center line EWMA control chart for the concentration data in Exercise 10.20. Compare it to the residuals control chart in Exercise 10.20, part (c).
To find the optimal  , fit an ARIMA (0,1,1) (= EWMA = IMA(1,1)):

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