PsiMaxExtreme Distribution

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.