Akayad χ² (chi-square)
Akayad adaddan i yesserwasen amḍan n tikkal i d-teffeɣ yal taxxamt d wayen yettwaṛǧan, n/37. Yettwasqedcen akken ad naẓ ma yella uḍebsi s umyal.
Deg usatal
Rnut (ayen yettwaẓren − ayen yettwaṛǧan)² / ayen yettwaṛǧan ɣef 37 n texxaminibenkanTaxxamtYiwet seg 37 n texxamin s wuṭṭunen ɣef uqerru yettezzin. Daɣen: slot, cup.Ɣer akk →; serwset-t d ubeṭṭu χ² s 36 n tfesniwin n tlellitanaritTifesniwin n tlelliAmḍan n yizalen imanayen deg yiwen usiḍen adaddan. I wakayad χ² ɣef 37 n texxamin d 36, acku imiḍanen ilaq ad msawin d tmerna.Ɣer akk →.
Karl Pearson yessuffeɣ-d akayad-a deg 1900, yerna yiwen seg yimedyaten-is imezwura d 26 306 n tuzzyiwin n rulit n Monte Carlo yettwarun, i yufa ur d-ttbanent ara d tigacuranin. Tasleḍt i d-yeḍfeṛen tenna-d dakken imaruyen n teɣmisin i tent-yuran snulfan-d kra seg-sent.