The data shown in Table 10E.9 are concentration readings from a chemical process, made every 30 minutes

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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).
The data shown in Table 10E.9 are concentration readings from

(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.

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

(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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