DISTRIBUSI POISSONVarian

E[x(x-1)]= = = = . = isalkan: y= x-2= dimana = 1 (distribusi binomial)= . 1=

Var(x) = E(x2) [E(x)]2= E[x(x-1) + x] [E(x)]2= E[x(x-1)] + E(x) [E(x)]2= + - = TERBUKTI