Video: Dab tsi yog chi square test hauv noob caj noob ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev faib tawm ntau zaus ntawm kev tsis sib txuas thiab txuas Cov noob
Chiv - Kev Xeem Squared . Chiv - kev ntsuas squared yog ib qho kev ntsuas ntsuas uas siv los txiav txim seb qhov sib txawv ntawm qhov kev soj ntsuam thiab qhov xav tau kev faib ntau zaus yog qhov tseem ceeb
Ntawm no, Chi Square yog dab tsi hauv noob caj noob ces?
Cov Chiv - Square Test Ib lo lus nug tseem ceeb los teb rau hauv ib qho twg caj ces kev sim yog peb tuaj yeem txiav txim siab seb peb cov ntaub ntawv haum rau ib qho ntawm Mendelian piv peb tau tham txog. Ib qho kev ntsuas ntsuas uas tuaj yeem ntsuas qhov sib piv yog qhov Chiv - Square los yog Goodness of Fit test. Yog xam qee - square tus nqi tsawg dua 0.
koj txhais li cas los ntawm chi square test? A qee - square (h2) Statistics yog a xeem uas ntsuas qhov kev cia siab piv rau cov ntaub ntawv pom tseeb (lossis cov txiaj ntsig qauv). Cov ntaub ntawv siv los suav a qee - square Kev txheeb cais yuav tsum yog random, nyoos, sib koom ua ke, kos los ntawm kev ywj pheej sib txawv, thiab kos los ntawm tus qauv txaus.
Kuj Paub, qhov kev kuaj chi square siv rau hauv cov noob caj noob ces yog dab tsi?
Cov noob caj noob ces kev tsom xam feem ntau xav tau kev txhais cov lej hauv ntau chav kawm phenotypic. Hauv cov xwm txheej zoo li no, tus txheej txheem txheeb cais hu ua χ2 ( qee - square ) xeem yog siv los pab txiav txim siab tuav los yog tsis lees paub qhov kev xav.
Yuav ua li cas koj sau ib tug null hypothesis?
Rau sau ib tug null hypothesis , ua ntej pib los ntawm kev nug ib lo lus nug. Rov hais dua cov lus nug ntawd hauv ib daim ntawv uas xav tias tsis muaj kev sib raug zoo ntawm qhov sib txawv. Hauv lwm lo lus, xav tias kev kho mob tsis muaj txiaj ntsig. Sau koj kev xav nyob rau hauv ib txoj kev uas qhia txog qhov no.
Pom zoo:
Dab tsi yog txhais los ntawm cov noob tseem ceeb thiab cov noob caj noob ces?
(Nyob rau hauv cov ntsiab lus ntawm caj ces, ib qho tseem ceeb tshaj plaws yog ib qho uas yog phenotypically qhia hauv heterozygotes). Ib qho tseem ceeb tshaj plaws yog tawm tsam qhov tsis zoo uas tshwm sim tsuas yog thaum muaj ob daim ntawv theej ntawm cov noob. (Nyob rau hauv cov ntsiab lus genetic, ib tug recessive zoo yog ib tug uas yog phenotypically qhia tsuas yog nyob rau hauv homozygotes)
Dab tsi yog qhov kev kuaj hla hauv cov noob caj noob ces?
Nyob rau hauv cov noob caj noob ces, ib qho kev sim hla, thawj zaug qhia los ntawm Gregor Mendel, koom nrog kev yug me nyuam ntawm ib tus neeg nrog phenotypically recessive tus neeg, txhawm rau txiav txim siab zygosity ntawm yav dhau los los ntawm kev txheeb xyuas qhov feem ntawm cov xeeb ntxwv phenotypes. Zygosity tuaj yeem yog heterozygous lossis homozygous
Dab tsi yog qhov tsis tiav dominance hauv noob caj noob ces?
Incomplete dominance yog ib daim ntawv ntawm cov qub txeeg qub teg hauv nruab nrab uas ib qho allele rau ib qho tshwj xeeb tsis qhia tag nrho nws cov khub allele. Qhov no tshwm sim nyob rau hauv ib tug thib peb phenotype nyob rau hauv uas qhia lub cev zoo yog ib tug ua ke ntawm cov phenotypes ntawm ob alleles
Dab tsi yog genotype hauv cov noob caj noob ces?
Hauv kev nkag siab dav dav, lo lus 'genotype' yog hais txog kev tsim caj ces ntawm lub cev; nyob rau hauv lwm yam lus, nws piav qhia txog lub cev tag nrho ntawm cov noob. Txhua khub ntawm alleles sawv cev rau lub genotype ntawm ib tug tshwj xeeb gene. Piv txwv li, nyob rau hauv cov txiv hmab txiv ntoo qab zib, cov noob rau paj xim muaj ob alleles
Dab tsi yog Codominance hauv cov noob caj noob ces tsis yog Mendelian?
Thaum cov alleles rau ib qho kev coj cwj pwm yog codominant, lawv ob leeg qhia sib npaug es tsis yog ib qho tseem ceeb allele noj tag nrho cov kev tswj ntawm ib qho allele recessive. Qhov no txhais tau hais tias thaum lub cev muaj ob qhov sib txawv alleles (piv txwv li, yog heterozygote), nws yuav qhia ob qho tib si tib lub sijhawm