PsiInvNormal Distribution

PsiInvNormal (μ,λ,...)

PsiInvNormal (µ,λ) is a distribution with a finite lower bound, where it is zero.  The Inverse Normal distribution is used to model Brownian motion and other diffusion processes.  As the parameter λ tends to infinity, the Inverse Normal distribution approaches a Normal distribution.

Alternate Formulation:  PsiInvNormalAlt

PsiInvNormalAlt is the PsiInvNormal distribution defined through alternative arguments.  Two parameters are required and both must be chosen from the following list:  two different percentiles, mean, var or scale.