The data in Table 9E 1 represent individual observations on molecular
The data in Table 9E.1 represent individual observations on molecular weight taken hourly from a chemical process. The target value of molecular weight is 1,050 and the process standard deviation is thought to be about σ = 25.
(a) Set up a tabular CUSUM for the mean of this process. Design the CUSUM to quickly detect a shift of about 1.0in the process mean.
(b) Is the estimate of σ used in part (a) of this problem reasonable?
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