Dab tsi yog qhov sib txawv loj ntawm univariate bivariate thiab multivariate tsom xam?
Dab tsi yog qhov sib txawv loj ntawm univariate bivariate thiab multivariate tsom xam?

Video: Dab tsi yog qhov sib txawv loj ntawm univariate bivariate thiab multivariate tsom xam?

Video: Dab tsi yog qhov sib txawv loj ntawm univariate bivariate thiab multivariate tsom xam?
Video: Txoj kev ua laib thaum kawg tsis tshuav dab tsi 3/23/2023 2024, Kaum ib hlis
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Univariate thiab multivariate sawv cev rau ob txoj hauv kev rau kev txheeb cais tsom xam . Univariate koom nrog tsom xam ntawm ib qho txawv txav thaum kev tsom xam ntau yam tshuaj xyuas ob lossis ntau qhov sib txawv. Feem ntau kev tsom xam ntau yam suav nrog ib qho kev hloov pauv thiab ntau yam hloov pauv ywj pheej.

Tsis tas li ntawd, qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab kev txheeb xyuas ntau yam sib txawv yog dab tsi?

Tsis tas li ntawd, qee txoj kev koj tuaj yeem tso tawm ib leeg cov ntaub ntawv muaj xws li cov lus faib zaus, kab kos kab, kab ntawv histograms, ntau zaus polygons, thiab kab kos duab. Kev tsom xam bivariate yog siv los xyuas seb puas muaj kev sib raug zoo nruab nrab ob txawv sib txawv. Kev txheeb xyuas ntau yam yog cov tsom xam ntawm peb lossis ntau qhov sib txawv.

Tom qab ntawd, lo lus nug yog, dab tsi yog qhov piv txwv ntawm kev txheeb xyuas ntau yam? Piv txwv ntawm multivariate regression Piv txwv 1. Ib tus kws tshawb fawb tau sau cov ntaub ntawv ntawm peb qhov kev hloov pauv ntawm lub hlwb, plaub qhov kev hloov pauv kev kawm (cov qhab nia xeem tus qauv), thiab hom kev kawm uas tus tub ntxhais kawm nyob rau hauv 600 cov tub ntxhais kawm theem siab. Ib tug kws kho mob tau sau cov ntaub ntawv ntawm cov roj cholesterol, ntshav siab, thiab qhov hnyav.

Ib yam li ntawd, koj tuaj yeem nug, qhov txawv ntawm qhov kev txheeb xyuas qhov sib txawv thiab kev txheeb xyuas bivariate yog dab tsi?

Nws yog ib qho ntawm cov ntaub ntawv yooj yim tshaj plaws ntawm kev txheeb cais tsom xam , siv los xyuas seb puas muaj kev sib raug zoo nruab nrab ob pawg ntawm cov nqi. Kev tsom xam tsis sib xws yog cov tsom xam ntawm ib ("uni") variable. Kev tsom xam bivariate yog cov tsom xam ntawm raws nraim ob qhov sib txawv. Multivariate tsom xam yog cov tsom xam ntawm ntau tshaj ob qhov sib txawv.

Dab tsi yog qhov kev tshawb nrhiav univariate hauv kev tshawb fawb?

Kev tsom xam tsis sib xws yog daim ntawv yooj yim tshaj plaws ntawm kev txheeb xyuas cov ntaub ntawv. "Uni" txhais tau tias "ib", yog li hauv lwm lo lus koj cov ntaub ntawv tsuas muaj ib qho sib txawv. Nws tsis cuam tshuam nrog qhov ua rau lossis kev sib raug zoo (tsis zoo li regression) thiab nws lub hom phiaj tseem ceeb yog piav qhia; nws siv cov ntaub ntawv, sau cov ntaub ntawv thiab nrhiav cov qauv hauv cov ntaub ntawv.

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