Question: Refer to Exercise 21.7. Determine the ARL until the x chart signals that the process is out of control when it is under control. In

Refer to Exercise 21.7. Determine the ARL until the x chart signals that the process is out of control when it is under control.

In exercise 21.7

The control limits of an x chart are set at two standard errors from the centerline. Calculate 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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