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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 159<br />

✬<br />

b(n,p)<br />

0.00 0.05 0.10 0.15 0.20<br />

●<br />

●<br />

✫<br />

●<br />

●<br />

●<br />

●<br />

●<br />

●<br />

0 5 10 15<br />

k<br />

●<br />

Binomska porazdelitev<br />

● ● ● ● ● ● ●<br />

> h plot(0:15,h,type="h",xlab="k",ylab="b(n,p)")<br />

> points(0:15,h,pch=16,cex=2)<br />

Binomska porazdelitev ima zalogo<br />

vrednosti {0, 1, 2, · · · , n} in verjetnosti,<br />

ki jih računamo po Bernoullijevem<br />

obrazcu:<br />

P (X = k) =<br />

<br />

n<br />

p<br />

k<br />

k (1 − p) n−k ,<br />

k = 0, 1, 2, · · · , n. Binomska porazdelitev<br />

je natanko določena z dvema podatkoma<br />

– parametroma: n in p. Če<br />

se slučajna spremenljivka X porazdeljuje<br />

binomsko s parametroma n in p,<br />

zapiˇsemo:<br />

X : B(n, p).<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

✩<br />

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