Hello
When I create an Xbar Chart with sub groups of various sizes defined by a label, I am getting different Avg Rs for the different subgroups (see graph).
How exactly are the avg Rs (displayed in the R Chart as the Center line) for a given subgroup calculated ?
Originally I thought they were the mean of the ranges within a subgroup, but there are several occasions (in the graph below), where the Avg R is bigger than the Range within a subgroup, so there seems to be another method behind it.
The used data is a color measurement with the subgroups chosen according to the film build the color layer has. (I am working with JMP 17, but have the same question with JMP 16)
![UnivariateRules_0-1686913977311.png UnivariateRules_0-1686913977311.png](https://community.jmp.com/t5/image/serverpage/image-id/53919iD37533A19AAC5331/image-size/medium?v=v2&px=400)
thank you and best regards