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Control chart rule of seven

On a control chart, seven points in a row fall on the same side of the mean, all within the control limits. What does this suggest?

A.The process is in control because every point is within limitsB.A non-random pattern that may mean the process is out of control and should be investigatedC.There must be an error in the data collectionD.The specification limits should be widened

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Control chart rule of seven

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