T Stat qhia koj li cas hauv kev thim rov qab?
T Stat qhia koj li cas hauv kev thim rov qab?

Video: T Stat qhia koj li cas hauv kev thim rov qab?

Video: T Stat qhia koj li cas hauv kev thim rov qab?
Video: Lus qhuab qhia Txhob thim rov qab 2024, Kaum ib hlis
Anonim

P, t thiab tus qauv yuam kev

Cov t daim ntawv txheeb cais yog tus coefficient muab faib los ntawm nws tus qauv yuam kev. Tus txheej txheem yuam kev yog qhov kwv yees ntawm tus qauv sib txawv ntawm tus coefficient, tus nqi nws txawv ntawm qhov xwm txheej. Nws tuaj yeem xav tias yog ib qho kev ntsuas ntawm qhov precision uas lub regression coefficient yog ntsuas.

Ua li no, t statistic qhia koj li cas?

Cov t -value ntsuas qhov loj ntawm qhov sib txawv ntawm qhov sib txawv ntawm koj cov ntaub ntawv piv txwv. Muab lwm txoj kev, T yog tsuas yog xam qhov sib txawv sawv cev nyob rau hauv units ntawm tus qauv yuam kev. Qhov loj dua qhov loj ntawm T , qhov ntau dua cov pov thawj tawm tsam null hypothesis.

Qhov thib ob, qhov siab T Stat txhais li cas? Koj siab t - txheeb cais , uas txhais ua tus nqi qis, tsuas yog hais tias qee yam tsis zoo li tshwm sim yog tias koj cov coefficients yog xoom hauv qhov tseeb. Qhov ntawd yog qhov siab t statistic txhais tau ntawm no.

Ua li no, vim li cas peb thiaj siv t test hauv regression?

t Tests . Cov kuaj yog siv mus ua hypothesis kuaj ntawm regression coefficients tau nyob rau hauv yooj yim linear regression . A txheeb cais raws li kev faib tawm yog siv rau xeem ob-sided hypothesis hais tias qhov tseeb txoj kab nqes,, sib npaug qee tus nqi tas li,.

Qhov txawv ntawm t test thiab regression yog dab tsi?

Lub ntsiab txawv yog tias t - kuaj thiab ANOVAs koom nrog kev siv categorical kwv yees, thaum linear regression suav nrog kev siv cov kev kwv yees tsis tu ncua. Thaum peb pib paub seb peb cov ntaub ntawv puas yog categorical lossis txuas ntxiv, xaiv qhov kev txheeb xyuas qhov tseeb yuav ua rau muaj kev nkag siab ntau dua.

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