IMSL_BETACDF: Beta distribution function.
            IMSL_BINOMIALCDF: Binomial distribution function.
            IMSL_BINOMIALPDF: Binomial probability function.
            IMSL_BINORMALCDF: Bivariate normal distribution.
            IMSL_CHISQCDF: Chi-squared distribution function.
            IMSL_FCDF: F distribution function.
            IMSL_GAMMACDF: Gamma distribution function.
            IMSL_HYPERGEOCDF: Hypergeometric distribution function.
            IMSL_NORMALCDF: Normal (Gaussian) distribution function.
            IMSL_POISSONCDF: Poisson distribution function.
            IMSL_TCDF: Student’s t distribution function.