hypergeometric quantile
[k]=hypg_inv(p,n,K,N)
* p = a vector
* n,K,N = parameters of the hypergeometric distribution (n = size of the population drawn, K = size of the class of interest among the whole population, N = size of the whole population).
* k = The vectors of the smallest integers so that P(X < = k) > = p(i) for each coordinate i of p.