Kev sib txheeb tsis hloov thaum cov ntsuas ntsuasntawm ib qho ntawm qhov hloov pauv. Hauv lwm lo lus, yog tias peb hloov cov ntsuas ntsuas ntawm qhov kev piav qhia sib txawv thiab / lossis cov lus teb sib txawv, qhov no tsis cuam tshuam rau qhov sib raug zoo (r).
Kev sib txheeb puas muaj ntsuas ntsuas?
Tus correlation coefficient r yog tus nqi tsis pub dawb ntawm -1 txog 1. Statistical tseem ceeb yog qhia nrog p-tus nqi. Yog li, kev sib raug zoo feem ntau yog sau nrog ob tus lej tseem ceeb: r=thiab p=.
Dab tsi hloov qhov kev sib raug zoo?
Ntxiv, rho tawm, sib faib lossis faib qhov tas mus li rau txhua tus lej hauv ib lossis ob qhov sib txawvtsis hloov pauv qhov sib txheeb coefficient. Qhov no yog vim qhov sib txheeb coefficient yog, qhov tseeb, kev sib raug zoo ntawm z-cov qhab nia ntawm ob qhov kev faib tawm.
Kev sib raug zoo tsis muaj units?
Ntawm qhov tod tes, kev sib raug zoo tsis muaj qhov loj. Nws yog ntsuas ntsuas tsis pub dawb ntawm kev sib raug zoo ntawm qhov sib txawv. Qhov no yog vim peb faib cov nqi sib txawv los ntawm cov khoom ntawm cov qauv sib txawv uas muaj tib lub units.
Yuav ua li cas cuam tshuam rau kev sib txheeb coefficient?
Tus sau piav qhia thiab piav qhia txog 6 yam uas cuam tshuam qhov loj ntawm Pearson kev sib raug zoo: (a) qhov sib txawv ntawm cov ntaub ntawv, (b) qhov sib txawv ntawm cov duab ntawm qhov 2 faib, (c) tsis muaj linearity, (d) muaj 1 los yog ntau tshaj "outliers," (e) tus yam ntxwv ntawm tus qauv, thiab (f) ntsuas yuam kev.
