Qhov tsawg tshaj plaws squares kwv yees yog dab tsi?
Qhov tsawg tshaj plaws squares kwv yees yog dab tsi?

Video: Qhov tsawg tshaj plaws squares kwv yees yog dab tsi?

Video: Qhov tsawg tshaj plaws squares kwv yees yog dab tsi?
Video: Qhov Ntawm Ko Yog Dab Tsi 2024, Kaum ib hlis
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Txoj kev ntawm tsawg squares yog hais txog kwv yees parameter los ntawm minimizing cov squared Qhov tsis sib xws ntawm cov ntaub ntawv pom, ntawm ib sab, thiab lawv cov txiaj ntsig xav tau ntawm lwm qhov (saib Cov Txheej Txheem Ua Haujlwm Zoo).

Kuj paub, qhov tsawg kawg yog squares txhais li cas?

Tsawg kawg xwmfab txhais tau tias yog txhais tau tias rau pab pawg uas raug kho rau txhais tau tias ntawm lwm yam hauv cov qauv. Qhia tsawg kawg xwmfab txhais tau tias rau cov kev tshawb fawb uas tsis muaj kev soj ntsuam sib npaug rau txhua qhov kev kho mob yog qee zaum pom zoo.

Tsis tas li ntawd, lub hauv paus ntsiab lus ntawm qhov tsawg tshaj plaws squares yog dab tsi? Econometrics Rau Dummies The yam tsawg kawg squares txoj cai hais tias SRF yuav tsum tau tsim (nrog rau qhov tsis tu ncua thiab nqes hav) kom cov sum ntawm cov squared Qhov kev ncua deb ntawm qhov pom qhov tseem ceeb ntawm koj qhov kev hloov pauv thiab cov txiaj ntsig kwv yees los ntawm koj SRF raug txo qis (tus nqi tsawg tshaj plaws).

Raws li kev sib raug zoo, vim li cas peb thiaj siv yam tsawg kawg nkaus square method?

Cov tsawg squares mus kom ze txwv qhov kev ncua deb ntawm ib tug muaj nuj nqi thiab cov ntaub ntawv cov ntsiab lus uas lub function piav. Nws yog siv nyob rau hauv regression tsom xam, feem ntau nyob rau hauv nonlinear regression qauv nyob rau hauv uas ib tug nkhaus yog haum rau ib pawg ntawm cov ntaub ntawv.

Qhov sum ntawm squares txhais li cas?

Cov sum ntawm squares yog ib qho kev ntsuas ntawm kev sib txawv ntawm qhov txhais tau tias . Hauv kev txheeb cais, cov txhais tau tias yog qhov nruab nrab ntawm ib pawg ntawm cov lej thiab yog qhov feem ntau siv kev ntsuas ntawm lub hauv paus nyiam. Tus lej lej txhais tau tias tsuas yog xam los ntawm kev suav cov txiaj ntsig hauv cov ntaub ntawv teeb tsa thiab faib los ntawm tus lej ntawm qhov tseem ceeb.

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