distribusi poisson (menentukan mean)

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DISTRIBUSI POISSON Fungsi : P(x)= e λ . λ x x ! ; x= 0,1,2,3,.. Mean μ = E(x) = x = 0 x . P ( x ) = x = 0 x . e λ . λ x x ! = x = 0 x . e λ . λ x x ! . λ λ = λ . x = 1 x . e λ . λ x 1 x ( x 1 ) ! = λ . x = 1 e λ . λ x 1 ( x 1 ) ! , misalkan: y= x-1 = λ . y = 0 e λ . λ y y ! dimana x = 1 e λ . λ y y ! = 1 (distribusi binomial) = λ . 1 E(x) = λ TERBUKTI

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DISTRIBUSI POISSON

Fungsi : P(x)= ; x= 0,1,2,3,..Mean= E(x)= = = . = . = . , misalkan: y= x-1= . dimana = 1 (distribusi binomial)= . 1 E(x) = TERBUKTI