mean=rnNmode=floor((r+1)(n+1)N+2)variance=r(nN)(1−nN)(N−r)(N−1)skewness=(N−2n)(N−1)(N−2r)rn(N−n)(N−r)(N−2)kurtosis excess=(N2(N−1)r(N−2)(N−3)(N−r))(N(N+1)−6N(N−r)n(N−n)+3r(N−r)(N+6)N2−6)