Dab tsi yog qhov kev xav ntawm Mann Whitney U xeem?
Dab tsi yog qhov kev xav ntawm Mann Whitney U xeem?

Video: Dab tsi yog qhov kev xav ntawm Mann Whitney U xeem?

Video: Dab tsi yog qhov kev xav ntawm Mann Whitney U xeem?
Video: «Ով» Սոֆի Մխեյան | «Qui» Sofi Mkheyan 2024, Kaum ib hlis
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Kev xav rau cov Mann Whitney U Test

Qhov sib txawv ntawm tus kheej yuav tsum yog ob pawg neeg ywj pheej, categorical pawg. Kev soj ntsuam yuav tsum muaj kev ywj pheej. Hauv lwm lo lus, yuav tsum tsis muaj kev sib raug zoo ntawm ob pawg lossis hauv txhua pab pawg. Kev soj ntsuam tsis yog ib txwm faib.

Tsis tas li ntawd, qhov kev xeem Mann Whitney U siv rau dab tsi?

Cov Mann - Whitney ua test yog siv rau Sib piv qhov sib txawv ntawm ob pawg neeg ywj pheej thaum qhov sib txawv ntawm qhov sib txawv yog qhov sib txawv lossis txuas ntxiv, tab sis tsis yog ib txwm faib.

Qhov thib ob, Mann Whitney U tus nqi txhais li cas? Hauv kev txheeb cais, cov Mann – Whitney ua test (tseem hu ua Mann – Whitney -Wilcoxon (MWW), Wilcoxon qeb-sum xeem los yog Wilcoxon- Mann – Whitney xeem ) yog ib qho kev tsis sib haum xeeb xeem ntawm qhov null hypothesis tias nws yog qhov sib npaug uas ib qho randomly xaiv tus nqi los ntawm ib tug pej xeem yuav tsawg dua los yog ntau tshaj ib tug randomly xaiv

Xav txog qhov no, koj yuav qhia li cas yog qhov kev xeem Mann Whitney U tseem ceeb?

Yog qhov null hypothesis muaj tseeb, ces tus nqi ntawm U yuav tsum yog ib nrab tus nqi. Yog tus nqi ntawm U yog ntau me dua qhov ntawd, tus nqi P yuav me me. Qhov tsawg tshaj plaws tau tus nqi ntawm U yog zero. Qhov txiaj ntsig loj tshaj plaws yog ib nrab ntawm cov khoom lag luam ntawm tus lej ntawm qhov tseem ceeb hauv pab pawg A zaug tus lej ntawm qhov tseem ceeb hauv pawg B.

Dab tsi yog qhov kev xav ntawm kev xeem?

Cov kev xav ntau uas tau ua thaum ua qhov kev xeem t-xeem muaj xws li qhov ntsuas qhov ntsuas, ntsuas qhov ntsuas, normality ntawm cov ntaub ntawv faib, txaus ntawm qauv loj thiab kev sib npaug ntawm variance nyob rau hauv standard deviation.

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