I'm curious why the decision limits for the Bias comparison ANOM in the MSA tool are narrower than those generated by fit Y by X.
From MSA
![Josh1_0-1665507988327.png Josh1_0-1665507988327.png](https://community.jmp.com/t5/image/serverpage/image-id/46192iF2C0367238B40D62/image-size/medium?v=v2&px=400)
Same data but from the Y/X tool:
![Josh1_1-1665508019133.png Josh1_1-1665508019133.png](https://community.jmp.com/t5/image/serverpage/image-id/46193i9731F94D9776DA8D/image-size/medium?v=v2&px=400)
The Y/X limits are 2X wider than the MSA limits.
Both charts are using a sample size of 30.
![Josh1_2-1665508041008.png Josh1_2-1665508041008.png](https://community.jmp.com/t5/image/serverpage/image-id/46194i19E246BD0AC8F9EF/image-size/medium?v=v2&px=400)
I believe these are the ANOM decision limit equations since they are referenced in JMP help
![Josh1_3-1665508063288.png Josh1_3-1665508063288.png](https://community.jmp.com/t5/image/serverpage/image-id/46195i87A62EB150B88148/image-size/medium?v=v2&px=400)
Alpha level, subgroup size, and within subgroup sample sizes are the same for both charts.
Why would the decision limits be 2X larger on the fit Y by X generated ANOM chart?