PsiMaxExtreme (m,s,...)
PsiMaxExtreme (m,s) is the positively skewed form of the Extreme Value distribution, which is the limiting distribution of a very large collection of random observations.
Alternate Formulation: PsiMaxExtremeAlt
PsiMaxExtremeAlt is the PsiMaxExtreme defined through alternative arguments. Two parameters are required and both must be chosen from the following list: 2 different percentiles, mean, var, mode or scale.
