Question: The data shown in Table 10E 9 are concentration readings from

The data shown in Table 10E.9 are concentration readings from a chemical process, made every 30 minutes (read down, then across from left to right).
(a) Calculate the sample autocorrelation function and provide an interpretation.
(b) Construct an individuals control chart with the standard deviation estimated using the moving range method. Provide an interpretation of this control chart.
(d) Are the residuals from the model in part (c) uncorrelated? Does this have any impact on your interpretation of the control chart from part (c)?

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