Question: In a certain industrial process. It is known that = 4, and it is desirable to detect a shift of 4 units in about 60

In a certain industrial process. It is known that = 4, and it is desirable to detect a shift of 4 units in about 60 minutes. Currently sampling is done every 15 minutes.a) What is the maximum out of control ARL for this process?b) Design a Cusum chart which detects the above shift with a sample of size 4 and has an in-control ARL of 500.

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