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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 536<br />

✬<br />

Ocena populacijskega deleˇza je<br />

✫<br />

P =<br />

Kot smo ˇze omenili, se statistika<br />

50 + 90<br />

200 + 300<br />

= 0, 28.<br />

z = p1 − p2 − (π1 − π2)H<br />

<br />

p(1 − p) <br />

1 1 + n1 n2<br />

.<br />

porazdeljuje pribliˇzno standardizirano normalno N(0, 1).<br />

Ker gre za dvostranski test, sta kritični vrednosti ±z α/2 = ±1, 65.<br />

Eksperimentalna vrednost statistike pa je<br />

ze =<br />

<br />

0, 30 − 0, 025 − 0<br />

0, 28(1 − 0, 28) 1<br />

300<br />

+ 1<br />

200<br />

<br />

= 1, 22.<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

▲<br />

✩<br />

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