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Process in statistical control has a mean of 100.0 and standard deviation of 3.0. ?_bar and...

Process in statistical control has a mean of 100.0 and standard deviation of 3.0. ?_bar and ? charts with subgroups of size 7 are used to monitor the process. If the process center shifts downward to 96.0, what is the probability of first point falling outside ?_bar chart control limits is on the third sample taken after the shift?

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