cdfbet - cumulative distribution function beta distribution  
cdfbin - cumulative distribution function binomial distribution  
cdfchi - cumulative distribution function chi-square distribution  
cdfchn - cumulative distribution function non-central chi-square distribution  
cdff - cumulative distribution function f distribution  
cdffnc - cumulative distribution function non-central f-distribution  
cdfgam - cumulative distribution function gamma distribution  
cdfnbn - cumulative distribution function negative binomial distribution  
cdfnor - cumulative distribution function normal distribution  
cdfpoi - cumulative distribution function poisson distribution  
cdft - cumulative distribution function student's t distribution  
grand - random number generator  
