UrnTheory   Vignette explaining the distributions of biased sampling
CompareHypergeo   Compares different noncentral hypergeometric distributions
ApproxHypergeo Compares different noncentral hypergeometric distributions with same mean rather than same odds
OddsPrecision  Measures precision of odds function
SampleWallenius   Makes random variates from Wallenius noncentral hypergeometric distribution
