![MikeKim_0-1699837785773.png MikeKim_0-1699837785773.png](https://community.jmp.com/t5/image/serverpage/image-id/58603iDDCDABDF95FABA08/image-size/medium?v=v2&px=400)
Well, above is the 415page of Pharmaceutical Quality by Desing Using JMP.
In above 90% at the last line is the Spec limit (LSL).
I am confusing the 1.3 looks like ensuring 90% Confidence. (1.282)
Can someone say that using 1.3 and this is 80% confidence?
I am sorry for the confusing question and many, but please help me.