Question: Refer to Exercise 21.5. What is the average run length until the x chart signals that the process is out of control when it is

Refer to Exercise 21.5. What is the average run length until the x chart signals that the process is out of control when it is under control?

In exercise 21.5

If the control limits of an x chart are set at 2.5 standard errors from the centerline, what is the probability that on any sample the control chart will indicate that the process is out of control when it is under control?

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