Kev lees txais qhov kev xav tsis tseeb yuav qhia tias koj tau ua pov thawj tsis muaj txiaj ntsig. Raws li koj tau pom, qhov ntawd tsis yog qhov tseeb. Koj tsis tuaj yeem ua pov thawj qhov tsis zoo! Hloov chaw, lub zog ntawm koj cov pov thawj poob qis ntawm kev tsis lees paub qhov null.
Thaum twg peb tuaj yeem lees txais qhov kev xav tsis tseeb?
Txhawb lossis tsis lees paub qhov kev xav tsis zoo? Yog tias P-tus nqi tsawg dua, tsis lees txais qhov kev xav tsis tseeb. Yog tias P-tus nqi ntau dua, khaws qhov kev xav tsis tseeb. 0.003 < 0.05, yog li peb muaj pov thawj txaus los tsis lees paub qhov kev xav tsis tseeb thiab lees txais qhov kev thov.
Thaum null hypothesis raug lees txais ces qhov tshwm sim tau hais tias yog?
Nyob rau hauv qhov kev ntsuam xyuas null, qhov kev ntsuas no hu ua α (alpha) thiab yuav luag txhua zaus teem rau.05. Yog tias muaj tsawg dua 5% qhov tshwm sim ntawm qhov tshwm sim hnyav raws li qhov piv txwv tshwm sim yog tias qhov kev xav tsis zoo yog qhov tseeb, ces qhov kev xav tsis tseeb yog tsis lees paub. Thaum qhov no tshwm sim, qhov tshwm sim tau hais tias yog statistically tseem ceeb.
Yuav ua li cas koj lees txais qhov kev xav tsis zoo hauv kev sim?
Yog tus tus nqi tseeb ntawm t-tus nqi ntau dua li tus nqi tseem ceeb, koj tsis lees paub qhov kev xav tsis tseeb. Yog tias tus nqi tiag tiag ntawm t-tus nqi tsawg dua tus nqi tseem ceeb, koj tsis lees paub qhov kev xav tsis tseeb.
Thaum twg koj tuaj yeem hais tias qhov kev xav tsis tseeb yog tsis lees paub lossis lees txais?
Cia peb rov qab thaum kawg rau lo lus nug ntawm seb peb puas lees txais lossis tsis lees txais qhov kev xav tsis tseeb. Yog tias peb qhov kev txheeb cais qhia tau tias qhov tseem ceeb ntawm qib qis dua tus nqi txiav tawm uas peb tau teeb tsa (xws li, txawm tias 0.05 lossis 0.01), peb tsis lees txais qhov kev xav tsis zoo thiab lees txais lwm qhov kev xav.
