Sivi chi-square
Ko ha sivi fakasitetisitika ʻoku ne fakahoa ʻa e lahi ʻo e hū ʻi he luo takitaha naʻe sio ki ai mo e n/37 ʻoku ʻamanekina. ʻOku ngāueʻaki ia ke fakamaauʻi pe ʻoku hehema ha veʻeteka.
ʻI hono ngāueʻaki
Tānaki ʻa e (naʻe sio ki ai − ʻamanekina)² / ʻamanekina ʻi he luomeʻangāueLuoKo e taha ʻo e ngaahi luo ʻe 37 ʻoku fakafika ʻi he konga vilo. ʻOku toe ui: slot, cup.Lau kotoa → ʻe 37; fakahoa ia mo e tufaki chi-square ʻi he tuʻunga tauʻatāinalēpiTuʻunga tauʻatāinaKo e lahi ʻo e ngaahi mahuʻinga tauʻatāina ʻi ha fika fakasitetisitika. Ki ha sivi chi-square ʻi he luo ʻe 37 ko e 36 ia, koeʻuhi kuo pau ke tānaki ʻa e ngaahi lau ki he fakakātoa.Lau kotoa → ʻe 36.
Naʻe pulusi ʻe Karl Pearson ʻa e sivi ʻi he 1900, pea ko e taha ʻo ʻene ʻuluaki ngaahi fakatātā ko e vilo lulēti ʻe 26,306 naʻe hiki ʻi Monte Carlo, ʻa ia naʻa ne pehē ʻoku ʻikai ke taʻefakataumuʻa ʻo fakaʻohovale. Naʻe fakahā ʻe ha vakai kimui ange naʻe faʻu ʻe he kau faiongoongo naʻa nau hiki ia ʻa e niʻihi.