In the Variability Chart platform, the Bias Report option shows a graph for Overall Measurement Bias with a summary table and a graph for Measurement Bias by Standard with a summary table. The average bias, or the differences between the observed values and the standard values, appears for each level of the X variable. A t test for the bias is also given.
The Bias Report option is available only when a Standard variable is provided in the launch window.
The Measurement Bias Report red triangle menu contains the following options:
Confidence Intervals
Calculates confidence intervals for the average bias for each part and places marks on the Measurement Bias Report by Standard plot.
Measurement Error Graphs
Produces a graph of Measurement Error versus all grouping columns together. There are also graphs of Measurement Error by each grouping column separately.