Regarding control charts changing from two-sigma limits to three-sigma limits A increases

Question

Regarding control charts, changing from two-sigma limits to three-sigma limits:

A) increases the probability of concluding nothing has changed, when in fact it has.

B) increases the probability of searching for a cause when none exists.

C) decreases the probability that the process average will change.

D) decreases the probability that defects will be generated by the process.

Answer

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