How to find inverse transformation of Random Normal Mixture with 6 known constants ( Locations 1 & 2, Dispersions 1 &2, Probabilities 1 & 2) The purpose is to calculate SPC control limits in the transformed space and then inverse transform back to the original space. I would use another transformation but this one is easily by far the best fit. I realize Quantile limits would be much easier to use, but need to avoid if possible. I am using JMP 17.