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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 200<br />

✬<br />

✫<br />

Večrazseˇzna normalna porazdelitev<br />

V dveh razseˇznostih N(µx, µy, σx, σy, ρ) ima gostoto<br />

p(x, y) =<br />

1<br />

<br />

2πσxσy 1 − ρ2 1<br />

e− 2(1−ρ2 x−µx ((<br />

) σx )2−2ρ x−µx<br />

σx<br />

V sploˇsnem pa jo zapiˇsemo v matrični obliki<br />

<br />

p(x) =<br />

det A 1<br />

e− 2<br />

(2π) n (x−µ)T A(x−µ)<br />

,<br />

kjer je A <strong>si</strong>metrična pozitivno definitna matrika.<br />

Vse robne porazdelitve so normalne.<br />

y−µy<br />

σy<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

+( y−µy<br />

σy )2 ) .<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

▲<br />

✩<br />

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