The Bias Comparison option creates an Analysis of Means chart. This chart shows the mean values for each level of the grouping variables and compares them with the overall mean. You can use this chart to see whether an operator is measuring parts too high or too low, on average.
select an option from the most common alpha levels or specify any level using the Other selection. Changing the alpha level modifies the upper and lower decision limits.
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Show Decision Limits draws lines representing the Upper Decision Limit (UDL) and the Lower Decision Limit (LDL) and defines those values.
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Show Decision Limit Shading adds shading between the UDL and the LDL.
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Show Center Line draws the center line statistic that represents the average.
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Point Options changes the chart display to needles, connected points, or points.
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