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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 412<br />

✬<br />

✫<br />

XIII. Veliki vzorec za (1 − α)%-ni interval zaupanja<br />

za razliko deleˇzev p1 − p2:<br />

(ˆp1 − ˆp2) ± z α/2<br />

ˆp1ˆq1<br />

n1<br />

Privzeli smo: velikost vzorca n je dovolj velika,<br />

da je aprok<strong>si</strong>macija veljavna.<br />

+ ˆp2ˆq2<br />

n2<br />

Kot sploˇsno pravilo za dovolj velika vzorca privzamemo naslednje:<br />

n1ˆp1 ≥ 4 n1ˆq1 ≥ 4.<br />

n2ˆp2 ≥ 4 in n2ˆq2 ≥ 4.<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

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● ❙ ▲<br />

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☛ ✖<br />

▲<br />

✩<br />

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