Video: Dab tsi yog deviance residuals?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov deviance residual yog qhov ntsuas ntawm deviance pab txhawb los ntawm txhua qhov kev soj ntsuam thiab muab los ntawm. qha di yog tus kheej deviance kev pab. Cov deviance residuals tuaj yeem siv los xyuas cov qauv haum ntawm txhua qhov kev soj ntsuam rau cov qauv linear generalized.
Ntawm no, dab tsi yog null deviance thiab residual deviance nyob rau hauv logistic regression?
Deviance yog ib qho kev ntsuas ntawm qhov zoo ntawm kev haum ntawm tus qauv. Cov lej siab dua ib txwm qhia tsis zoo. Cov tsis ncaj ncees lawm qhia tau hais tias zoo npaum li cas cov lus teb hloov pauv tau kwv yees los ntawm tus qauv uas suav nrog tsuas yog qhov cuam tshuam (qhov loj me) qhov twg seem nrog suav nrog cov kev hloov pauv ywj pheej.
Kuj Paub, dab tsi yog residuals nyob rau hauv logistic regression? Hauv logistic regression , zoo li linear regression , cov cov seem tuaj yeem txhais tau raws li pom cov txiaj ntsig xav tau. Cov ntaub ntawv yog discrete thiab yog li ntawd cov seem . Raws li qhov tshwm sim, cov phiaj xwm nyoos cov seem los ntawm logistic regression feem ntau tsis muaj txiaj ntsig.
Tsuas yog li ntawd, kev sib txawv txhais li cas hauv kev txheeb cais?
Deviance ( txheeb cais ) Ib txheeb cais , deviance yog kev zoo-ntawm-fit txheeb cais rau a txheeb cais qauv; nws yog feem ntau siv rau txheeb cais kev ntsuam xyuas hypothesis. Nws yog ib tug generalization ntawm lub tswv yim ntawm kev siv cov sum ntawm squares ntawm residuals nyob rau hauv dog dig tsawg squares rau cov neeg uas ua qauv-fitting yog ua tiav los ntawm qhov siab tshaj plaws.
Koj xam deviance li cas?
Ntau precisely, lub deviance yog txhais raws li qhov sib txawv ntawm qhov tshwm sim ntawm tus qauv haum thiab tus qauv saturated: D = −2loglik(^β) + 2loglik(saturated qauv).
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