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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 171<br />

✬<br />

dnorm2 (x)<br />

0.0 0.2 0.4 0.6 0.8<br />

✫<br />

−6 −4 −2 0 2 4 6<br />

> d2 curve(d2,-6,6,col="blue")<br />

> curve(dnorm,-6,6,col="red",add=TRUE)<br />

x<br />

... Normalna porazdelitev<br />

Zaloga vrednosti normalno porazdeljene<br />

slučajne spremenljivke so vsa realna<br />

ˇstevila, gostota verjetnosti pa je:<br />

p(x) = 1<br />

σ √ 2π<br />

1 x−µ<br />

e− 2 ( σ )2<br />

.<br />

Normalna porazdelitev je natanko<br />

določena z parametroma: µ in σ.<br />

Če se slučajna spremenljivka X<br />

porazdeljuje normalno s parametroma<br />

µ in σ zapiˇsemo:<br />

X : N(µ, σ).<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

✩<br />

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