Function hg_pmf 

pub fn hg_pmf(x: u64, n: u64, N: u64, M: u64) -> f64

Computes probability mass function (pmf) for X ~ HG(n,N,M) where X = the number of successes.

Parameters

• Sample size: n = 1,2,3,...,N
• Population size: N = 1,2,3,...
• Number of successes in population: M = 1,2,3,...,N

Support

• x = 0,1,2,...,n
• x <= M
• n-x <= N-M

Example

Suppose X ~ HG(n=20,N=100,M=50). To compute P(X = 7), use

use ruststat::hg_pmf;
println!("P(X=x): {}", hg_pmf(7, 20, 100, 50));