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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 544<br />

✬<br />

✫<br />

. . . Analiza variance<br />

Ker sta obe cenilki za varianco σ 2 , pri domnevi H0, njuno razmerje F = S2<br />

m<br />

S 2 v<br />

ne more biti zelo veliko. Iz<br />

F = S2 m<br />

S 2 v<br />

= Q2 m/(r − 1)<br />

Q 2 v/(n − r) =<br />

Q 2<br />

m<br />

σ 2 /(r − 1)<br />

Q 2 v<br />

σ 2 /(n − r)<br />

vidimo da gre za Fisherjevo (Snedecorjevo) porazdelitev F (r − 1, n − r).<br />

Podatke zapiˇsemo v tabelo analize variance<br />

VV VK PS PK F<br />

faktor Q 2 m r − 1 S 2 m F<br />

slučaj Q 2 v n − r S 2 v<br />

Q 2 n − 1<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

▲<br />

✩<br />

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