Txoj kev txheeb ze rau kev sib txheeb yuav tau sim seb puas muaj kev sib txheeb ntawm ob qhov tseem ceeb hauv ib qho qauv lossis ntawm ob qhov qauv sib txawv. Yog tias pom ib qho kev sib txuas, tom qab ntawd nws yog qhov yuav tsum tau txiav txim siab seb nws puas nrog nrog qhov nce ntxiv hauv ib qho taw qhia los ntawm qhov nce lossis qis dua hauv lwm qhov.
Cov Lus Qhia
Kauj ruam 1
Txiav txim siab ntawm cov ntsuas uas koj xav tau los ua cov kev txheeb xyuas qhov sib txheeb. Txawm li cas los xij, nco ntsoov tias nws yuav pab koj txiav txim siab seb nws puas tuaj yeem kwv yees qee qhov tseem ceeb ntawm ib tus nqi, paub txog qhov zoo ntawm lwm tus. Rau lub hom phiaj no, koj tuaj yeem siv 2 txoj kev sib txawv: cov qauv kev suav ntawm kev suav cov coefficient r (Brave-Pearson) thiab kev txiav txim siab ntawm qhov sib txheeb ntawm cov coefficient rs (Spearman's ranks), uas yog siv rau cov ntaub ntawv ua ntu zus thiab yog nonparametric.
Kauj ruam 2
Txheeb xyuas qhov sib txheeb rau qhov sib npaug - tus nqi uas tuaj yeem nyob ntawm ib txog -1. Ntxiv mus, thaum muaj qhov ua rau sib txheeb, tus coefficient yuav sib npaug rau ntxiv rau ib qho, thiab yog muaj qhov tsis zoo rau kev sib txuam, nws yuav yog qhov rho tawm. Koj tuaj yeem sau cov ntawv sib liam ntawm cov nuj nqis koj xav tshawb xyuas. Ntawm nws koj yuav tau txais qee yam kev ncaj hla dhau cov ntsiab lus ntawm cov kev sib tshuam ntawm cov ntsuas ntawm txhua tus khub ntawm cov nqi no. Nyob rau hauv lem, yog tias cov ntsiab lus no (xav txog qhov tseem ceeb) tsis nce kab hauv kab ncaj nraim thiab tsim "huab", tom qab ntawd qhov sib txheeb ntawm qhov sib npaug hauv qhov tsis muaj nuj nqis yuav tsawg dua ib qho, thiab raws li qhov huab no tau npawv, nws yuav ze rau xoom. Yog tias qhov sib txheeb ntawm qhov sib npaug yog sib npaug rau 0, nws txhais tau hais tias ob qho hloov pauv yog qhov ywj pheej ntawm ib leeg.
Kauj ruam 3
Kos ntsiab lus xaus hais txog kev sib raug zoo ntawm cov hloov pauv. Nyob rau tib lub sijhawm, mob siab rau qhov qauv loj: qhov loj dua nws yog, ntau qhov kev ntseeg tau tus nqi ntawm cov tau txais cov txheeb ze txheeb xyuas qhov sib txuam yuav yog. Muaj cov ntxhuav tshwj xeeb uas muaj cov khoom tseem ceeb ntawm kev sib raug zoo sib xws raws li Brave-Pearson thiab Spearman. Cov ntsuas no tuaj yeem siv los txiav txim siab sib txawv ntawm cov qib kev ywj pheej (nws yog sib npaug nrog cov lej ntawm cov khub rho tawm ob). Tsuas yog hauv rooj plaub thaum kev sib txheeb ntawm qhov sib npaug yog ntau dua qhov tseem ceeb no, lawv yuav raug txiav txim siab txhim khu kev qha.
