Uvavanyo lwe-chi-square
Uvavanyo lwezibalo-manani oluthelekisa ukuphuma okubonwayo kwisikhewu ngasinye nokulindelekileyo u-n/37. Lusetyenziselwa ukugweba ukuba ivili lithambekile na.
Kumxholo
Dibanisa (okubonwayo − okulindelekileyo)² / okulindelekileyo kuzo zonke izikhewuizixhoboIsikhewuEsinye sezikhewu ezingama-37 ezinamanani kwirotha. Kwakhona: slot, cup.Funda yonke → ezingama-37; thelekisa nokwabiwa kwe-chi-square kwi-degrees of freedomilebhuAmaqondo enkululeko (degrees of freedom)Inani lamaxabiso azimeleyo kwizibalo-manani. Kuvavanyo lwe-chi-square kwizikhewu ezingama-37 ngama-36, kuba izibalo kufuneka zidibane zibe sisixa esipheleleyo.Funda yonke → ezingama-36.
UKarl Pearson wapapasha olu vavanyo ngo-1900, kwaye omnye wemizekelo yakhe yokuqala yayiyimijikelo engama-26,306 ye-roulette yaseMonte Carlo erekhodiweyo, awafumanisa ukuba ayingowokunqaba ngendlela ekrokrisayo. Uhlalutyo lwamva lwacebisa ukuba iintatheli ezazirekhoda zayiqamba eminye.