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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 583<br />

✬<br />

Ničelna in osnovna domneva sta v primeru tega testa<br />

H0: χ 2 = 0 (spremenljivki nista povezani)<br />

H1: χ 2 > 0 (spremenljivki sta povezani)<br />

Iz tabele za porazdelitev χ 2 lahko razberemo kritične vrednost te statistike<br />

pri 5% stopnji značilnosti:<br />

✫<br />

χ 2 1−α[(s − 1)(v − 1)] = χ 2 0,95(2) = 5, 99.<br />

Eksperimentalna vrednost statistike χ 2 pa je:<br />

χ 2 e =<br />

(16 − 26)2<br />

26<br />

+ (48 − 38)2<br />

38<br />

+ (36 − 46)2<br />

+ (40 − 30)2<br />

30<br />

46<br />

+ (36 − 36)2<br />

+ (24 − 24)2<br />

24<br />

36<br />

= 12.<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

▲<br />

✩<br />

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