Question: Suppose 30 control limits are constructed for the average temperature in a furnace. Samples of size 4 were selected with the average temperature being 5000

Suppose 30 control limits are constructed for the average temperature in a furnace. Samples of size 4 were selected with the average temperature being 5000 C and a standard deviation oi 50 C, Id. If the process average drops to 4960, what is the probability of the shift being detected within the first two samples

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