Video: Dab tsi yog qhov null hypothesis thaum siv cov txheej txheem Anova?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Cov tsis muaj hypothesis rau ANOVA yog tias qhov nruab nrab (tus nqi nruab nrab ntawm qhov sib txawv ntawm qhov sib txawv) yog tib yam rau txhua pawg. Lwm txoj kev los yog kev tshawb fawb kev xav yog tias qhov nruab nrab tsis zoo ib yam rau txhua pawg. Cov ANOVA xeem txheej txheem tsim ib qho F-statistic, uas yog siv los xam p-tus nqi.
Tsis tas li cov lus nug yog, ua li cas koj tsis lees paub qhov kev xav tsis zoo hauv Anova?
Thaum tus nqi p-tus nqi tsawg dua qhov tseem ceeb, qhov kev txhais lus ib txwm yog qhov txiaj ntsig tseem ceeb, thiab koj tsis lees paub H 0. Rau ib txoj kev ANOVA , koj tsis lees paub tus tsis muaj hypothesis thaum muaj pov thawj txaus los xaus tias tsis yog txhua txoj kev sib npaug.
Ib tug kuj yuav nug, dab tsi yog qhov tseem ceeb hauv Anova? ANOVA yog ib daim ntawv ntawm statistical hypothesis testing hnyav siv nyob rau hauv kev tsom xam cov ntaub ntawv sim. Ib qho kev xeem (xws li los ntawm qhov kev xav tsis zoo thiab cov qauv) yog hu ua statistically tseem ceeb yog tias nws pom tias tsis zoo li tshwm sim los ntawm lub sijhawm, piv txwv li qhov tseeb ntawm qhov kev xav tsis tseeb.
Tom qab ntawd, lo lus nug yog, yuav ua li cas koj sau ib tug null hypothesis rau ib txoj kev Anova?
Zuag qhia tag nrho null hypothesis rau ib - txoj kev ANOVA nrog k pawg yog H0: µ1 = ··· = µk. Lwm txoj kev kev xav yog tias "cov pejxeem txhais tau tias tsis yog txhua tus sib npaug".
Qhov kev xeem Anova qhia koj li cas?
ANOVA yog ib qho txheej txheem txheeb cais uas ntsuas qhov sib txawv ntawm qhov ntsuas-theem nyob ntawm qhov sib txawv los ntawm qhov sib txawv nominal-theem uas muaj 2 lossis ntau pawg. Piv txwv li, ib qho ANOVA tuaj yeem tshuaj xyuas qhov sib txawv ntawm IQ cov qhab nia los ntawm Lub Tebchaws (US vs. Qhov no xeem tseem hu ua Fisher tsom xam ntawm variance.
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