Question: Standardized Control Chart. Consider the P chart with the usual 3-sigma control limits. Suppose that we define a new variable as the quantity to plot

Standardized Control Chart. Consider the P chart with the usual 3-sigma control limits. Suppose that we define a new variable

Standardized Control Chart. Consider the P chart with the usual 3-sigma control

as the quantity to plot on a control chart. It is proposed that this new chart has a center line at 0 with the upper and lower control limits at ±3. Verify that this standardized control chart is equivalent to the original P chart.

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