Qhov Mean Squared yuam kev (MSE) yog qhov ntsuas ntawm qhov sib ze ntawm kab haum rau cov ntaub ntawv cov ntsiab lus. … Lub MSE muaj cov chav nyob squared ntawm txhua yam uas tau npaj rau ntawm txoj kab ntsug. Lwm qhov ntau uas peb suav yog Root Mean Squared yuam kev (RMSE). Nws tsuas yog lub hauv paus square ntawm lub ntsiab lus square yuam kev.
Dab tsi yog qhov txawv ntawm txhais tau tias square thiab tsawg square yuam kev?
MSE yog qhov kwv yees zoo uas koj yuav xav siv ! Txhawm rau ua kom tiav, nco ntsoov tias LSE yog ib txoj hauv kev tsim qauv thiab MSE yog ib qho kev ntsuas uas ntsuas koj tus qauv kev ua yeeb yam. MSE (Mean Squared yuam kev) yog txhais tau tias yog qhov yuam kev squared piv txwv li qhov qhov sib txawv ntawm tus kwv yees thiab kwv yees
Vim li cas txhais tau tias qhov yuam kev squared yog squared?
Nws ua qhov no los ntawm kev coj qhov kev ncua deb ntawm cov ntsiab lus mus rau txoj kab regression (cov kev ncua deb no yog "yuam kev") thiab squaring lawv. Lub squaring yog tsim nyog los tshem tawm cov cim tsis zoo. Nws kuj muab qhov hnyav ntxiv rau qhov sib txawv loj. Nws yog hu ua lub ntsiab lus squared yuam kev raws li koj tab tom nrhiav qhov nruab nrab ntawm cov teeb meem yuam kev
Dab tsi yog qhov txawv ntawm qhov yuam kev squared thiab R Squared?
R-Squared kuj tseem hu ua tus qauv qauv ntawm MSE. R-squared sawv cev rau feem ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov lus teb sib txawv uas tau ntes los ntawm tus qauv regression es tsis yog MSE uas ntes qhov yuam kev seem.
MSE thiab SSE yog dab tsi?
Sum ntawm squared yuam kev (SSE) yog qhov tseeb qhov hnyav ntawm qhov yuam kev squared yog tias qhov kev xaiv yuam kev heteroscedastic tsis sib npaug rau qhov sib txawv tas li. Qhov nruab nrab squared yuam kev (MSE) yog SSE muab faib los ntawm qib ntawm kev ywj pheej rau qhov tsis raug rau tus qauv txwv, uas yog n-2 (k + 1).
