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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 315<br />

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(A) Vzorčno povprečje<br />

Proizvajalec embalaˇze kumare bi rad ugotovil povprečno dolˇzino kumarice<br />

(da se odloči za velikost embalaˇze), ne da bi izmeril dolˇzino čisto vsake.<br />

Zato naključno izbere n kumar in izmeri njihove dolˇzine X1, . . . , Xn.<br />

Sedaj nam je ˇze blizu ideja, da je vsaka dolˇzina Xi slučajna spremenljivka<br />

(numerični rezultat nalkjučnega eksperimenta).<br />

Univerza v Ljubljani ▲<br />

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● ❙ ▲<br />

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☛ ✖<br />

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