PsiNormal (µ,σ) is an unbounded, symmetric distribution with the familiar bell curve, also called a Gaussian distribution. The Normal distribution is widely used in many different kinds of applications. A normal distribution with mean zero and standard deviation one is called a Standard normal distribution.
The sum of independent random variables of any shape tends to the Normal distribution.
Alternate Formulation: PsiNormalAlt
PsiNormalAlt is the PsiNormal distribution defined through alternative arguments. Two parameters are required and must be used in the following combinations: 2 different percentiles, percenitile and mean or percentile and standard deviation.