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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 352<br />

✬<br />

✫<br />

Poissonova porazdelitev<br />

k e−λ<br />

Za Poissonovo porazdelitev P (λ) s parametrom λ, pk = λ k! je<br />

in dalje<br />

ter končno<br />

λx1+···+xn<br />

−nλ<br />

L = e<br />

x1! · · · xn!<br />

ln L = −nλ + (x1 + · · · + xn) ln λ − ln(x1! · · · xn!)<br />

∂ ln L<br />

∂λ = −n + x1 + · · · + xn<br />

λ<br />

= n<br />

(X − λ)<br />

λ<br />

Najučinkovitejˇsa cenilka za parameter λ je X z disperzijo DX = λ<br />

n .<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

▲<br />

✩<br />

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