# A machine is used to fill cans with motor oil additive. A single sample can is selected every hour… 1 answer below »

A machine is used to fill cans with motor oil additive. A single sample can is selected every hour and the weight of the 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.

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(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 = 4.77 and

(b) Does the value of σ = 0.05 seem reasonable for this process?

 TABLE 9 E .2 Fill Data for Exercise 9.4 Sample Sample Number x Number x 1 8.00 13 8.05 2 8.01 14 8.04 3 8.02 15 8.03 4 8.01 16 8.05 5 8.00 17 8.06 6 8.01 18 8.04 7 8.06 19 8.05 8 8.07 20 8.06 9 8.01 21 8.04 10 8.04 22 8.02 11 8.02 23 8.03 12 8.01 24 8.05