PsiExponential (β) is a distribution with a finite lower bound and rapidly decreasing values. It can be used to represent time between random occurrences in queuing and reliability engineering applications.
The minimum of a set of independent exponential random variables is also an exponentially distributed random variable.
Alternate Formulation: PsiExponentialAlt
PsiExponentialAlt is the PsiExponential distribution defined through alternative arguments. One parameter is required which must be chosen from the following list: percentile or var.