dcnb                    PMF of Conditional Negative Binomial
mu_cnb                  Mean of Conditional Negative Binomial
pcnb                    CDF of Conditional Negative Binomial
qcnb                    Quantile Function of Conditional Negative
                        Binomial
rcnb                    Random Number Generation from Conditional
                        Negative Binomial
sigma2_cnb              Variance of Conditional Negative Binomial
