Video: Yuav ua li cas yog ib co piv txwv ntawm non probability sampling?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Piv txwv ntawm kev tsis txaus ntseeg sampling muaj xws li: yooj yim, haphazard los yog xwm txheej kev kuaj - cov tswv cuab ntawm tus cov pej xeem raug xaiv raws li lawv cov txheeb ze yooj yim ntawm kev nkag. Rau qauv cov phooj ywg, cov phooj ywg, lossis cov neeg yuav khoom ntawm ib lub khw, yog txhua tus piv txwv ntawm kev yooj yim kev kuaj.
Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog hom kev ua piv txwv tsis zoo?
Muaj tsib hom kev ua piv txwv uas tsis yog qhov tshwm sim uas koj tuaj yeem siv thaum ua cov ntawv pov thawj ntawm qib kawm qib siab thiab tus tswv: quota sampling , yooj yim sampling , purposive sampling, tus kheej - xaiv sampling thiab snowball sampling.
Ib yam li ntawd, koj txhais li cas los ntawm qhov tsis yog qhov ua piv txwv? Tsis yog - qhov tshwm sim sampling yog a kev kuaj txheej txheem qhov twg cov qauv yog sib sau ua ke nyob rau hauv ib tug txheej txheem uas ua tsis muab tag nrho cov tib neeg hauv cov pej xeem sib npaug ntawm kev xaiv.
Ib yam li ntawd, ib qho piv txwv ntawm qhov tsis muaj tshwm sim piv txwv yog dab tsi?
Piv txwv ntawm kev tsis txaus ntseeg sampling muaj xws li: yooj yim, haphazard los yog xwm txheej kev kuaj - cov tswv cuab ntawm cov pej xeem raug xaiv raws li lawv cov txheeb ze yooj yim ntawm kev nkag. Ua piv txwv cov phooj ywg, cov neeg ua haujlwm sib koom ua ke, lossis cov neeg yuav khoom hauv ib lub khw, yog txhua tus piv txwv ntawm kev yooj yim kev kuaj.
Dab tsi yog cov piv txwv ntawm qhov tshwm sim sampling?
Qhov tshwm sim sampling yog raws li qhov tseeb tias txhua tus tswv cuab ntawm cov pej xeem muaj kev paub thiab sib npaug ntawm kev xaiv. Rau piv txwv , yog tias koj muaj 100 tus neeg, txhua tus neeg yuav muaj qhov sib txawv ntawm 1 ntawm 100 ntawm kev xaiv. Nrog tsis- qhov tshwm sim sampling , cov odds no tsis sib npaug.
Pom zoo:
Yuav ua li cas yog ib qho piv txwv ntawm kev siv computer innovation?
Qee qhov piv txwv ntawm kev tsim kho tshiab suav nrog: kev hloov kho hauv lub cev, xws li kev tsav tsheb tus kheej; software tsis siv lub cev, xws li apps; thiab cov ntsiab lus tsis siv lub cev, xws li eCommerce
Yuav ua li cas yog ib qho piv txwv ntawm kev piav qhia ntxaws?
Ntau zaus peb tuaj yeem tsim mnemonics - uas yog cov khoom siv uas siv cov qauv ntawm cov ntawv, cov tswv yim, lossis cov koom haum kom nco txog qee yam - raws li ib qho kev piav qhia ntxaws. Piv txwv li, coj thawj tsab ntawv ntawm cov npe ntawm cov khoom peb yuav tsum nco ntsoov thiab siv lawv los tsim cov lus ntawm kab lus
Dab tsi yog qhov sib txawv tseem ceeb ntawm Amazon EBS thim rov qab thiab piv txwv khw Rov qab piv txwv?
Dab tsi yog qhov sib txawv tseem ceeb ntawm Amazon EBS-txhawb thiab qhov piv txwv-khoom txhawb nqa? Amazon EBS-rov qab piv txwv tuaj yeem nres thiab rov pib dua. Instance-store backed instances tuaj yeem nres thiab rov pib dua. Nws pib scaling yuav tsum siv Amazon EBS-rov qab piv txwv
Kuv yuav txwv tsis pub nkag mus rau ec2 piv txwv li cas?
Txhawm rau txwv tsis pub cov neeg siv nkag mus rau tso tawm EC2 piv txwv siv tagged AMIs, tsim AMI los ntawm ib qho piv txwv uas twb muaj lawm - lossis siv AMI uas twb muaj lawm - thiab tom qab ntawd ntxiv ib daim ntawv rau AMI. Tom qab ntawd, tsim ib qho kev cai IAM txoj cai nrog cov xwm txheej uas txwv tsis pub cov neeg siv kev tso cai tso tawm tsuas yog cov piv txwv uas siv tagged AMI
Ib qho piv txwv ntawm snowball sampling yog dab tsi?
Snowball sampling. Raws li cov tswvcuab cov qauv tsis raug xaiv los ntawm cov qauv qauv, cov qauv snowball raug rau ntau qhov kev tsis ncaj ncees. Piv txwv li, cov neeg uas muaj ntau tus phooj ywg feem ntau yuav raug xaiv los ua tus qauv. Thaum siv kev sib raug zoo virtual, cov txheej txheem no hu ua virtual snowball sampling