Question: what is the answer ? A process that is assumed to be in control with limits of 90+4 had sample averages for the x-bar chart

what is the answer ?

A process that is assumed to be in control with limits of 90+4 had sample averages for the x-bar chart of the following: 87.1,87,872. 89,90,88.5, 89.5, and 88. Which of the following statement below are correct? O a. Process mean is out-of-control Ob. None of above Oc Not enough information to determine Od Process mean is in-control

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