# Question

Set up a moving center-line EWMA control chart for the molecular weight data in Exercise 10.16. Compare it to the residual control chart in Exercise 10.16, part (c).

To find the optimal , fit an ARIMA (0,1,1) (= EWMA = IMA(1,1)):

To find the optimal , fit an ARIMA (0,1,1) (= EWMA = IMA(1,1)):

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