Homework Statement
For the negative binomial distribution, with r known, describe the natural parameter space
Homework Equations
the pmf for the negative binomial distribution with parameters r and p can be
1) P(X=x|r,p)= \binom {x-1}{r-1}p^{r}(1-p)^{x-r} where x=r,r+1,... , or
2)...