Video: Chi square puas tuaj yeem tsis zoo?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ua koj txhais tau tias: Ua tau tus nqi ntawm qis square puas tau tsis zoo ? Lo lus teb tsis yog. Tus nqi ntawm a qis square ua tsis tau tsis zoo vim nws yog raws li ib tug sum ntawm squared qhov sib txawv (nruab nrab ntawm qhov tau txais thiab cov txiaj ntsig xav tau).
Ib yam li ntawd, vim li cas chi square faib ib txwm zoo?
Tus nqi suav ntawm Chi - Square yog ib txwm zoo vim qhov sib txawv ntawm Observed zaus thiab qhov xav tau zaus yog squared , yog (O - E)2 thiab tus demoninator yog tus naj npawb xav tau uas yuav tsum yog zoo . Cov Chi - Square faib yog zoo skewed.
Ib sab saum toj no, chi squared puas tuaj yeem yog 0? Nyob rau hauv kev txheeb cais, lub non-central qee - squared kev faib nrog xoom qib kev ywj pheej ua tau siv rau hauv kev sim qhov null hypothesis tias tus qauv yog los ntawm ib qho kev faib tawm ntawm lub sijhawm ( 0 , 1). Nws yog qhov tsis tseem ceeb uas yog "central" qee -square faib nrog xoom qib ntawm kev ywj pheej concentrates tag nrho qhov tshwm sim ntawm xoom.
Ib yam li ntawd, koj puas tuaj yeem muaj qhov tsis zoo T tus nqi?
Yog tias nws me dua li qhov kev xav tus nqi , tiam t - txheeb cais yuav tsis zoo . Yog tias nws loj dua, lub t - txheeb cais yuav yog zoo. A tsis zoo kos npe txhais tau hais tias tus qauv txhais tau tsawg dua li qhov kev xav tau.
Yuav ua li cas koj tsis lees paub qhov null hypothesis Chi Square?
Hauv lwm lo lus, thaum xam x2 statistic tshaj tus nqi tseem ceeb hauv lub rooj rau 0.05 qhov tshwm sim, ces peb tuaj yeem ua tau tsis lees paub qhov null hypothesis ntawm vaj huam sib luag.
Pom zoo:
Lub cav puas tuaj yeem muaj lub hauv paus tsis zoo?
Yog li, kev ua haujlwm exponential nrog lub hauv paus tsis zoo, xws li tsis yog ntau ntawm kev ua haujlwm ntawm tag nrho (nws tsis tas li), vim nws tsuas tuaj yeem ntsuas ntawm qhov tshwj xeeb x-tus nqi. Nws yog vim li no uas peb tsuas yog xav txog logarithms nrog cov hauv paus zoo, vim cov hauv paus tsis zoo tsis tas mus li thiab feem ntau tsis muaj txiaj ntsig
Koj puas tuaj yeem siv kev txhaum thiab cos ntawm cov duab peb sab tsis zoo?
Xav txog lwm daim duab peb sab uas tsis yog txoj cai, sau npe raws li qhia nrog sab ntev x thiab y. Peb tuaj yeem muab tau ib txoj cai muaj txiaj ntsig uas tsuas muaj cov haujlwm cosine xwb. Txoj cai ntawm cosines tuaj yeem siv los nrhiav kev ntsuas ntawm lub kaum sab xis lossis ib sab ntawm daim duab peb sab uas tsis yog txoj cai yog peb paub: peb sab thiab tsis muaj kaum
Puas yog qhov tsis zoo thiab qhov zoo nqes hav tuaj yeem sib npaug?
Theorem 104: Yog hais tias ob kab muaj tib txoj kab nqes, ces cov kab yog nonverttical parallel kab. Yog hais tias ob kab yog perpendicular thiab tsis yog ib tug ntsug, ces ib tug ntawm cov kab muaj ib tug zoo nqes hav, thiab lwm yam muaj ib tug tsis zoo nqes hav. Tsis tas li ntawd, qhov tseem ceeb ntawm lawv txoj kab nqes yog qhov sib txuam
Koj puas tuaj yeem ntxiv Tsis zoo li radicals?
Tab sis tej zaum koj yuav tsis tuaj yeem ua kom yooj yim qhov sib ntxiv tag nrho mus rau ib tus lej. Ib yam li 'koj tsis tuaj yeem ntxiv txiv apples thiab txiv kab ntxwv', yog li koj kuj tsis tuaj yeem ua ke 'tsis zoo li' cov ntsiab lus radical. Txhawm rau kom muaj peev xwm sib txuas cov ntsiab lus radical ua ke, cov ntsiab lus yuav tsum muaj tib yam radical
Vim li cas tsis zoo thiab tsis zoo yog qhov zoo?
Thaum koj muab qhov tsis zoo los ntawm qhov tsis zoo koj tau txais qhov zoo, vim tias ob lub cim tsis zoo raug muab tso tseg