A Process That Is Assumed to Be in Control with Limits

question 153

Multiple Choice

A process that is assumed to be in control with limits of 89 +/- 2 had sample averages of the following 87.1, 87, 87.2, 89, 90, 89.5, 88.5, and 88. Is the process in control?

• A) Yes
• B) No, one or more averages exceeded the limits.
• C) Not enough information to tell.
• D) No, there is a distinguishable trend.
• E) No, two or more consecutive points are very near the lower (or upper) limit.

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