Nyob rau hauv txoj kev xav tau thiab kev txheeb cais, qhov kev faib tawm ntawm cov khoom sib txuas ntawm ib qho kev sib sau ntawm qhov sib txawv ntawm qhov sib txawv yog qhov tshwm sim ntawm qhov sib txawv ntawm cov khoom sib txawv. … Marginal variables yog cov kev hloov pauv hauv cov khoom sib txawv ntawm cov khoom tau khaws cia
Dab tsi yog marginalization hauv qhov tshwm sim?
Marginalisation qhia rau peb tsuas yog ntxiv qee qhov tshwm sim kom tau mus rau qhov xav tau ntau npaum li cas. Thaum peb tau suav peb cov lus teb (nws tuaj yeem yog ib tus nqi lossis ib qho kev faib tawm) peb tuaj yeem tau txais yam khoom uas peb xav tau (kev xav).
Kev faib tawm raws li kev txheeb cais yog dab tsi?
Ib yam kev faib tawm yog a qhov tshwm sim faib rau cov pej xeem sub-. Hauv lwm lo lus, nws qhia qhov tshwm sim uas ib qho khoom xaiv xaiv nyob rau hauv cov pej xeem muaj cov yam ntxwv uas koj txaus siab rau. … Qhov no yog lub rooj sib faib zaus.
Dab tsi yog qhov sib txawv ntawm marginal thiab conditional distribution?
Marginal probability yog qhov tshwm sim ntawm qhov xwm txheej tsis hais txog qhov tshwm sim ntawm lwm qhov sib txawv. Qhov xwm txheej tshwm sim yog qhov tshwm sim ntawm ib qho xwm txheej tshwm sim nyob rau hauv lub xub ntiag ntawm qhov xwm txheej thib ob.
Yuav ua li cas sib koom ua ke thiab piv txwv yog dab tsi?
Qhov tshwm sim sib koom yog qhov tshwm sim ntawm ob qhov xwm txheej tshwm sim ua keOb qhov xwm txheej feem ntau yog xaiv qhov xwm txheej A thiab qhov xwm txheej B. Hauv cov ntsiab lus tshwm sim, nws tuaj yeem sau ua: … Piv txwv li: Qhov tshwm sim uas daim npav yog tsib thiab dub=p(tsib thiab dub)=2/52=1/26.
