Dab tsi yog qhov zoo ntawm kev siv tshuaj ntsuam xyuas regression?
Dab tsi yog qhov zoo ntawm kev siv tshuaj ntsuam xyuas regression?

Video: Dab tsi yog qhov zoo ntawm kev siv tshuaj ntsuam xyuas regression?

Video: Dab tsi yog qhov zoo ntawm kev siv tshuaj ntsuam xyuas regression?
Video: tshuaj zoo thaiv dab tsog tsuag, zoo me nyuam tog quav, zoo raws plab me nyuam mos 2024, Kaum ib hlis
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Qhov tseem ceeb ntawm tsom xam regression yog qhov itis tag nrho txog cov ntaub ntawv: cov ntaub ntawv txhais tau tias cov lej thiab cov lej uas txhais tau tias koj lub lag luam. Cov qhov zoo ntawm regressionanalysis yog tias nws tuaj yeem tso cai rau koj txhawm rau txhawm rau txhawm rau txhawm rau pab koj txiav txim siab zoo dua rau koj txoj kev lag luam tam sim no thiab yav tom ntej.

Ib yam li ntawd ib tug yuav nug, dab tsi yog qhov zoo ntawm regression?

Qhov loj tshaj qhov zoo ntawm linear regression cov qauv yog linearity: Nws ua rau cov txheej txheem kwv yees yooj yim thiab, qhov tseem ceeb tshaj, cov kab sib npaug no muaj kev nkag siab yooj yim rau kev txhais lus ntawm qib modular (piv txwv li qhov hnyav).

Tsis tas li ntawd, yog vim li cas ntau qhov kev ntsuam xyuas regression tseem ceeb? Ua ntej, nws yuav raug siv los txheeb xyuas lub zog ntawm qhov cuam tshuam uas cov kev hloov pauv ywj pheej muaj nyob ntawm qhov sib txawv ntawm qhov sib txawv. Qhov ntawd yog, ntau linear regression tsom xam pab peb to taub ntau npaum li cas tus dependent variable hloov thaum peb hloov qhov txawv txawv txawv.

Xav txog qhov no, dab tsi yog qhov tseem ceeb ntawm kev tsom xam regression?

Kev tsom xam txog kev rov qab los yog txhua yam hais txog cov ntaub ntawv. Nws pab cov lag luam nkag siab txog cov ntaub ntawv uas lawv muaj thiab siv lawv - tshwj xeeb tshaj yog kev sib raug zoo ntawm cov ntaub ntawv cov ntsiab lus - kom txiav txim siab zoo dua, suav nrog txhua yam los ntawm kev kwv yees kev muag khoom kom nkag siab txog qib khoom muag thiab kev xa khoom thiab kev thov.

Dab tsi yog lub hom phiaj ntawm kev siv cov kev ntsuam xyuas regression Yuav ua li cas siv cov kev ntsuam xyuas regression los tsim cov tswv yim?

Cov lub hom phiaj ntawm tsom xam regression yog topredict tus nqi ntawm ib qho kev sib txawv los ntawm kev xav tias qhov tseem ceeb ntawm lwm qhov sib txawv nrog rau nws. Kev ntsuam xyuas kev rov qab los yog siv nyob rau hauv forecasting vim nws yog ib tug econometric forecasting txoj kev.

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