Question: Consider an control chart with , UCL 21.71, LCL 18.29, and n 6. Suppose that the mean shifts to 17. (a) What

Consider an control chart with , UCL 

21.71, LCL  18.29, and n   6.

Suppose that the mean shifts to 17.

(a) What is the probability that this shift will be detected on the next sample?

(b) What is the ARL after the shift?

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