Video: Hom 2 yuam kev hauv kev txheeb cais yog dab tsi?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
A yam II yuam kev yog a txheeb cais lub sij hawm xa mus rau qhov tsis lees paub ntawm qhov tsis tseeb null hypothesis. Nws yog siv nyob rau hauv cov ntsiab lus ntawm kev sim ntsuas . Nyob rau hauv lwm yam lus, nws tsim ib tug cuav zoo. Cov yuam kev tsis lees txais lwm qhov kev xav, txawm tias nws tsis tshwm sim vim muaj caij nyoog.
Ib yam li ntawd, koj tuaj yeem nug, Dab tsi yog Hom 1 thiab Hom 2 yuam kev hauv kev txheeb cais?
Hauv txheeb cais hypothesis test, a hom kuv yuam kev yog qhov tsis lees paub qhov tseeb null hypothesis (tseem hu ua "false positive" nrhiav lossis xaus), thaum yam II yuam kev yog qhov tsis lees paub ntawm qhov tsis tseeb qhov kev xav tsis tseeb (tseem hu ua "false negative" nrhiav lossis xaus).
Kuj Paub, koj yuav paub li cas yog nws hom 1 lossis hom 2 yuam kev? Nyob rau hauv ntau cov ntsiab lus tseeb, yam 2 yuam kev tshwm sim thaum lub null hypothesis yog cuav thiab koj tom qab tsis kam lees nws. Yog qhov tshwm sim ntawm kev ua a yam 1 yuam kev yog txiav txim siab los ntawm "α", qhov tshwm sim ntawm a yam 2 yuam kev yog "β".
Hauv qhov no, qhov piv txwv ntawm hom 2 yuam kev yog dab tsi?
A Hom II yuam kev tau cog lus thaum peb tsis ntseeg qhov tseeb. Khoom qab zib Crush dabneeg. Txuas ntxiv peb tus tswv yug yaj thiab hma piv txwv . Ntxiv dua thiab, peb qhov kev xav tsis tseeb yog tias tsis muaj "tsis muaj hma tam sim no." A yam II yuam kev (lossis cuav tsis zoo) yuav ua tsis muaj dab tsi (tsis yog "hma quaj") thaum muaj hma tam sim no.
Dab tsi yog hom kev ua yuam kev hauv kev txheeb cais?
Hom ntawm Statistical yuam kev thiab lawv txhais li cas. Hom Kuv yuam kev tshwm sim thaum peb tsis lees txais qhov kev xav tsis tseeb uas yog qhov tseeb; Qhov tshwm sim ntawm qhov tshwm sim no yog qhia los ntawm alpha (a). Hom II yuam kev yog thaum peb lees txais qhov kev xav tsis tseeb uas yog qhov tseeb tiag; nws qhov tshwm sim yog hu ua beta (b).
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