Hauv luv luv, nws ua kom txhua pab pawg neeg nyob hauv cov pej xeem tau txais kev sawv cev zoo hauv cov qauv. Raws li qhov tshwm sim, stratified random sampling muab kev pabcuam zoo dua ntawm cov pejxeem txij li cov kws tshawb fawb tau tswj hwm cov pab pawg ua haujlwm kom ntseeg tau tias txhua tus sawv cev hauv qhov piv txwv.
Vim li cas stratified sampling zoo dua random?
Ib tus qauv stratified tuaj yeem muab qhov tseeb ntau dua li qauv random yooj yim ntawm tib qhov loj. Vim tias nws muab qhov tseeb dua, cov qauv stratified feem ntau xav tau cov qauv me me, uas txuag nyiaj.
Puas yog stratified sampling zoo dua qhov systematic?
Cov qauv stratified muaj qee qhov zoo thiab qhov tsis zoo piv rauqauv random yooj yim. Vim tias nws siv cov yam ntxwv tshwj xeeb, nws tuaj yeem muab tus sawv cev tseeb dua ntawm cov pej xeem raws li qhov tau siv los faib rau hauv cov subsets sib txawv.
Cov txiaj ntsig ntawm stratification yog dab tsi?
Qhov tseem ceeb tshaj plaws ntawm kev stratification yog nws pab txhawb kev sib raug zoo thiab kev tswj hwm. Hauv pab pawg neeg sib raug zoo, muaj ib lossis ntau tus thawj coj lees paub ua rau muaj txiaj ntsig zoo dua hauv kev txiav txim siab, sib piv rau cov txheej txheem sib luag uas vam khom kom tau txais kev pom zoo ntawm tag nrho pawg.
Dab tsi yog qhov tsis zoo ntawm stratified sampling?
Ib qho tsis zoo ntawm cov qauv stratified yog tias thexaiv qhov tsim nyog strata rau tus qauv yuav nyuaj. Qhov thib ob downside yog tias kev npaj thiab ntsuas cov txiaj ntsig yog qhov nyuaj dua piv rau qhov piv txwv yooj yim.
