Hypergeometric Distribution

Question 0

What is the variance of a hypergeometric distribution?

Answer 0

(N-n)/(N-1)

Where N is the total number of objects and n is the total number of type A objects.

Question 1

What is the expected value of a hypergeometric distribution?

Answer 1

nr/N

Where n is the total number of type A objects, r is a random sample size and N is the total number of objects.