Which Is a Rule of Thumb to Indicate an Out-Of-Control

question 10

Multiple Choice

Which is a rule of thumb to indicate an out-of-control process on the chart?

• A) Single point outside one sigma
• B) Two of three successive points outside one sigma on the same side of the centerline
• C) Four of five successive points on the same side of the centerline
• D) Nine successive points alternating in sign

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