Question

A machine is used to fill cans with motor oil additive. A single sample can is obtained. Since the filling process is automated, it has very stable variability, and long experience indicates that σ = 0.05 oz. The individual observations for 24 hours of operation are shown in Table 9E.2.
(a) Assuming that the process target is 8.02 oz, set up a tabular CUSUM for this process. Design the CUSUM using the standardized values h = 4.77 and k = ½.
(b) Does the value of σ = 0.05 seem reasonable for this process?


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  • CreatedNovember 06, 2015
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