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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 222<br />

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Zvezne pogojne porazdelitve<br />

Postavimo B = (y ≤ Y < y + h) za h > 0 in zahtevajmo P (B) > 0.<br />

FX(x | B) = P (X < x | B) =<br />

= F (x, y + h) − F (x, y)<br />

Če obstaja limita (za h → 0)<br />

FY (y + h) − FY (y) .<br />

FX(x|y) = FX(x | Y = y) = lim<br />

h→0<br />

P (X < x, y ≤ Y < y + h)<br />

P (y ≤ Y < y + h)<br />

jo imenujemo pogojna porazdelitvena funkcija<br />

slučajne spremenljivke X glede na dogodek (Y = y).<br />

F (x, y + h) − F (x, y)<br />

FY (y + h) − FY (y) ,<br />

Univerza v Ljubljani ▲<br />

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=<br />

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● ❙ ▲<br />

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☛ ✖<br />

✩<br />

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