This module provides a perl interface to the DCDFLIB. See the section on
the DCDFLIB manpage for more information.

Functions are available for 7 continuous distributions (Beta, Chi-square,
F, Gamma, Normal, Poisson and T-distribution) and for two discrete
distributions (Binomial and Negative Binomial). Optional non-centrality
parameters are available for the Chi-square, F and T-distributions.
Cumulative probabilities are available for all 9 distributions and quantile
functions are available for the 7 continuous distributions.

All cumulative probability function names begin with the character "p".
They give the probability of being less than or equal to the given value [
'P(X <= x)' ]