Video: Tus nqi siab P qhia peb li cas?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Ib qho me me p - tus nqi (feem ntau ≦ 0.05) qhia cov pov thawj muaj zog tiv thaiv qhov kev xav tsis zoo, yog li koj tsis lees paub qhov null hypothesis. Ib tug loj p - tus nqi (> 0.05) qhia cov pov thawj tsis muaj zog tiv thaiv qhov kev xav tsis zoo, yog li koj tsis kam lees qhov null hypothesis.
Tib neeg kuj nug, tus nqi P siab txhais tau tias qhov tshwm sim ntau dua lossis tsawg dua?
A p - tus nqi siab dua tshaj 0.05 (> 0.05) tsis suav nrog tseem ceeb thiab qhia cov pov thawj muaj zog rau qhov null hypothesis. Qhov no txhais tau tias peb khaws qhov kev xav tsis zoo thiab tsis lees txais lwm qhov kev xav. Koj yuav tsum Nco ntsoov tias koj tsis tuaj yeem lees txais qhov kev xav tsis zoo, peb tsuas tuaj yeem lees txais qhov tsis muaj lossis tsis lees txais nws.
Ib sab saum toj no, tus nqi P txhais li cas hauv cov ntsiab lus? Cov P tus nqi , los yog xam qhov tshwm sim, yog Qhov tshwm sim ntawm kev nrhiav pom qhov pom, lossis ntau dua, tshwm sim thaum qhov kev xav tsis zoo (H 0) ntawm ib nqe lus nug yog muaj tseeb - qhov txhais ntawm 'extreme' nyob ntawm seb qhov kev xav li cas yog raug kuaj.
Kuj paub, yog tus nqi siab P zoo lossis phem?
Hauv feem ntau ntawm kev tshuaj ntsuam, ib qho alpha ntawm 0.05 yog siv los txiav tawm qhov tseem ceeb. Yog tias p - tus nqi tsawg dua 0.05, peb tsis lees paub qhov kev xav tsis tseeb uas tsis muaj qhov sib txawv ntawm qhov txhais tau tias thiab txiav txim siab tias muaj qhov sib txawv tseem ceeb. Hauv qab 0.05, tseem ceeb. Tshaj 0.05, tsis tseem ceeb.
P tus nqi ntau dua 0.05 txhais li cas?
P > 0.05 yog probability tias qhov null hypothesis muaj tseeb. 1 mins ua P tus nqi yog qhov probability tias lwm txoj kev xav yog qhov tseeb. Cov txiaj ntsig tseem ceeb ntawm kev xeem ( P ≦ 0.05 ) txhais tau tias hais tias qhov kev xeem hypothesis yog cuav lossis yuav tsum tsis lees paub. A P tus nqi ntau dua 0.05 txhais tau tias tias tsis muaj kev cuam tshuam.
Pom zoo:
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