Hom 1 yuam kev txhais li cas?
Hom 1 yuam kev txhais li cas?

Video: Hom 1 yuam kev txhais li cas?

Video: Hom 1 yuam kev txhais li cas?
Video: Курс Юаня 2024, Kaum ib hlis
Anonim

Nyob rau hauv statistical 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 hom 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).

Hais txog qhov no, hom 1 yuam kev piv txwv yog dab tsi?

Piv txwv ntawm a Hom Kuv yuam kev Lub null hypothesis yog tias tus neeg tsis muaj txim, thaum lwm txoj kev txhaum. Qhov no yuav ua rau cov kws tshawb fawb tsis lees paub lawv qhov kev xav tsis tseeb tias cov tshuaj yuav tsis muaj txiaj ntsig. Yog tias cov tshuaj ua rau qhov kev loj hlob nres, qhov kev txiav txim siab tsis lees txais qhov null, qhov no, yuav yog qhov tseeb.

Ib sab saum toj no, qhov tshwm sim ntawm hom 1 yuam kev yog dab tsi? Cov qhov tshwm sim ua a hom Kuv yuam kev yog α, uas yog theem ntawm qhov tseem ceeb uas koj tau teev tseg rau koj qhov kev ntsuam xyuas kev xav. Ib qho α ntawm 0.05 qhia tias koj txaus siab lees txais 5% txoj hauv kev uas koj ua yuam kev thaum koj tsis lees paub qhov kev xav tsis tseeb. Cov qhov tshwm sim ntawm tsis lees paub qhov null hypothesis thaum nws tsis tseeb yog sib npaug 1 -β.

Ua raws li qhov no hauv kev txiav txim siab, dab tsi ua rau hom 1 yuam kev?

Feem ntau, a Hom Kuv yuam kev tshwm sim thaum qhov kev ntsuam xyuas tseem ceeb ua rau tsis lees paub qhov tseeb null hypothesis. Los ntawm ib qho kev pom zoo, yog tias tus nqi ntawm qhov tshwm sim yog qis dua 0.05, ces qhov kev xav tsis zoo yog tsis lees paub.

Qhov laj thawj ntawm hom kuv yuam kev yog dab tsi?

A Hom I yuam kev yog thaum peb tsis lees paub qhov tseeb null hypothesis. Cov qhov tshwm sim ntawm no yog tias yog qhov kev xav tsis tseeb yog qhov tsis tseeb, nws yuav nyuaj dua rau kev tsis lees paub siv tus nqi qis rau α. Yog li siv cov nqi qis ntawm α tuaj yeem ua rau muaj qhov tshwm sim ntawm a Hom II yuam kev.

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