Variables Charts for Subgroups
Xbar-R Chart
Before you start
Overview
Data considerations
Example
Perform the analysis
Enter your data
Scale
Labels
Multiple graphs
Data options
Xbar-R options
Interpret the results
Key results
All statistics and graphs
Methods and formulas
Estimating sigma
Xbar chart
R chart
Unbiasing constants d2(), d3(), and d4()
Unbiasing constants c4() and c5()
Box-Cox