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Quality Control: Xbar Chart
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1. Chart description: means of a continuous process variable.


2. Click Quality Control | Xbar...


Variables  observations for a subgroup are in one row of columns.

Estimate (Rbar / Sbar)

Rbar  Choose to estimate s based on the average of the subgroup ranges.

Sbar  Choose to estimate s based on the average of the subgroup standard deviations.


3. After the chart is generated, click Commend to view the chart.