Dab tsi yog qhov sib txawv coefficient?
Dab tsi yog qhov sib txawv coefficient?

Video: Dab tsi yog qhov sib txawv coefficient?

Video: Dab tsi yog qhov sib txawv coefficient?
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Hauv kev txheeb cais, cov coefficient ntawm ntau correlation yog ib qho kev ntsuas ntawm qhov zoo npaum li cas ib qho kev hloov pauv tuaj yeem kwv yees siv qhov kev ua haujlwm ntawm cov txheej txheem ntawm lwm qhov sib txawv. Nws yog tus kev sib raug zoo nruab nrab ntawm qhov sib txawv ntawm qhov muaj nuj nqis thiab qhov kev kwv yees zoo tshaj plaws uas tuaj yeem suav tau los ntawm cov kev kwv yees sib txawv.

Ib yam li ntawd, nws tau nug, puas yog ntau R zoo ib yam li kev sib raug zoo coefficient?

Hauv ntau regression, ua ntau R yog cov coefficient ntawm ntau correlation , whereas nws square coefficient ntawm kev txiav txim siab. R 2 tuaj yeem txhais tau tias qhov feem pua ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv uas tuaj yeem piav qhia los ntawm cov neeg twv; raws li saum toj no, qhov no kuj muaj tseeb yog tias tsuas muaj ib tus kwv yees xwb.

Dhau li ntawm saum toj no, dab tsi yog ib feem correlation coefficient? A ib nrab correlation coefficient piav qhia lub zog ntawm kev sib raug zoo ntawm ob qhov sib txawv, tuav tas li ntau ntawm lwm qhov sib txawv.

Ntawm no, qhov txawv ntawm qhov yooj yim thiab ntau qhov sib txheeb yog dab tsi?

Thaum tsuas yog ob qhov sib txawv tau kawm nws yog qhov teeb meem ntawm yooj yim correlation . Thaum peb los sis ntau qhov sib txawv tau kawm nws yog ib qho teeb meem ntawm ob qho tib si ntau los yog ib nrab kev sib raug zoo . Hauv ntau correlation peb lossis ntau qhov sib txawv tau kawm ib txhij.

Dab tsi yog qhov zoo ntau yam R?

Ntau R . Nws qhia koj tias kev sib raug zoo linear muaj zog npaum li cas. Piv txwv li, tus nqi ntawm 1 txhais tau tias kev sib raug zoo zoo tag nrho thiab tus nqi ntawm xoom txhais tau tias tsis muaj kev sib raug zoo. Nws yog lub hauv paus square ntawm r squared (saib # 2).

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