Cov txheej txheem:
Video: Yuav ua li cas koj xam chi square faib?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Chi-Square Distribution
- Lub ntsiab lus ntawm kev faib tawm yog sib npaug rau cov qib ntawm kev ywj pheej: μ = v.
- Qhov sib txawv yog sib npaug rau ob npaug ntawm cov qib kev ywj pheej: σ2 = 2 * v.
- Thaum cov qib kev ywj pheej ntau dua lossis sib npaug rau 2, qhov siab tshaj plaws rau Y tshwm sim thaum Χ2 = v-2.
Hais txog qhov no, chi square faib qhia koj li cas?
Cov Chiv - square test yog npaj los ntsuam xyuas seb yuav ua li cas nws yog qhov pom kev faib tawm yog vim muaj caij nyoog. Nws tseem yog hu ua "kev ua tau zoo ntawm kev haum", vim tias nws ntsuas qhov pom zoo npaum li cas kev faib tawm ntawm cov ntaub ntawv haum nrog cov kev faib tawm uas yuav tsum tau yog hais tias cov variables yog ywj siab.
Lub chi square faib zoo li cas? Lub ntsiab lus ntawm a Chi Square faib yog nws qib kev ywj pheej. Chi Square Distributions yog qhov zoo skewed, nrog rau qib ntawm skew txo nrog nce qib ntawm kev ywj pheej. Raws li qib ntawm kev ywj pheej nce, lub Chi Square faib mus txog qhov qub kev faib tawm.
Tsis tas li, koj siv lub rooj faib khoom chi square li cas?
Hauv cov ntsiab lus, ntawm no yog cov kauj ruam koj yuav tsum tau siv hauv kev siv lub rooj chi-square kom pom tus nqi chi-square:
- Nrhiav cov kab uas sib haum rau cov qib kev ywj pheej, r.
- Nrhiav cov kab uas coj los ntawm qhov tshwm sim ntawm kev txaus siab
- Txiav txim siab tus nqi chi-square qhov twg r kab thiab kab yuav tshwm sim sib tshuam.
Koj ua li cas xam tus nqi uas xav tau?
Hauv kev txheeb cais thiab kev txheeb xyuas qhov tshwm sim, tus xav tau tus nqi yog xam los ntawm kev sib faib txhua qhov tshwm sim tau los ntawm qhov zoo li txhua qhov txiaj ntsig yuav tshwm sim thiab tom qab ntawd suav tag nrho cov tus nqi . Los ntawm xam cov nqi uas xav tau , cov tub ua lag luam tuaj yeem xaiv qhov scenario feem ntau yuav muab cov txiaj ntsig xav tau.
Pom zoo:
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