Dab tsi yog qhov null hypothesis rau 2 tus qauv t test?
Dab tsi yog qhov null hypothesis rau 2 tus qauv t test?

Video: Dab tsi yog qhov null hypothesis rau 2 tus qauv t test?

Video: Dab tsi yog qhov null hypothesis rau 2 tus qauv t test?
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Lub neej ntawd null hypothesis rau 2 - piv t - xeem yog tias ob pawg sib npaug. Koj tuaj yeem pom hauv kab zauv uas thaum ob pawg sib npaug, qhov sib txawv (thiab tag nrho qhov sib piv) kuj sib npaug zero.

Kuj nug, dab tsi yog qhov null hypothesis rau kev xeem t?

Muaj ob hom kev xav rau ib qho qauv t - xeem , cov null hypothesis thiab lwm txoj kev xav . Lwm txoj kev kev xav xav tias qee qhov sib txawv ntawm qhov tseeb txhais tau tias (Μ) thiab tus nqi sib piv (m0), qhov null hypothesis xav tias tsis muaj qhov sib txawv.

Kuj Paub, P tus nqi yog dab tsi hauv 2 tus qauv t xeem? Ob- Qauv t - xeem . Cov p - tus nqi yog qhov tshwm sim uas qhov txawv ntawm qhov qauv txhais tau hais tias tsawg kawg yog loj npaum li qhov tau pom, raws li kev xav tias cov pejxeem txhais tau tias sib npaug.

Ib yam li ntawd, koj tuaj yeem nug, ob qho qauv t xeem qhia koj li cas?

Ob - Qauv t - Kuaj . A ob - piv t - xeem yog siv rau xeem qhov txawv (d0) nruab nrab ob pej xeem txhais tau tias. Ib daim ntawv thov siv yog los txiav txim seb cov txhais tau li cas sib npaug. Txhua tus ua ib nqe lus hais txog qhov sib txawv d ntawm qhov nruab nrab ntawm ib tug pejxeem Μ1 thiab lub ntsiab lus ntawm lwm cov pejxeem Μ 2.

Yuav ua li cas koj tsis lees paub qhov kev xav tsis zoo hauv t xeem?

Yog tus nqi kiag li ntawm t -tus nqi ntau dua tus nqi tseem ceeb, koj tsis lees paub tus null hypothesis . Yog tus nqi kiag li ntawm t -tus nqi tsawg dua tus nqi tseem ceeb, koj tsis ua tsis lees paub tus null hypothesis.

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