It is not possible for the $\bar { X }$ chart to be out of control when the R chart is in control.

Name: It is not possible for the $\bar { X }$ chart to be out of control when the R chart is in control.
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Question

Quizplus · Accepted Answer

It is possible for the $\bar { X }$ chart to be out of control even if the R chart is in control. This can happen if there is a shift in the process mean or if there is a systematic pattern in the data that is not detected by the R chart.

It Is Not Possible for The Xˉ\bar { X }Xˉ Chart to Be Out of Control When the R Chart

It Is Not Possible for The $\bar { X }$ Chart to Be Out of Control When the R Chart