Yuav ua li cas koj pom qhov kev xav tau piv rau hauv chi square test?
Yuav ua li cas koj pom qhov kev xav tau piv rau hauv chi square test?

Video: Yuav ua li cas koj pom qhov kev xav tau piv rau hauv chi square test?

Video: Yuav ua li cas koj pom qhov kev xav tau piv rau hauv chi square test?
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Yog xam 2, thawj zaug txiav txim tus lej xav tau hauv txhua qeb. Yog tias piv yog 3: 1 thiab tag nrho cov neeg pom yog 880, ces tus xav tau Tus lej yuav tsum yog 660 ntsuab thiab 220 daj. Chiv - square xav kom koj siv tus lej muaj nuj nqis, tsis yog feem pua lossis piv.

Ib sab ntawm qhov no, koj yuav pom qhov kev cia siab li cas hauv chi square test?

Chi Square Kev Xeem ntawm Kev ywj pheej Ha: Ob qhov sib txawv ntawm qhov sib txawv. Tam sim no peb yuav tsum xam cov xav tau qhov tseem ceeb rau txhua lub xov tooj ntawm lub rooj thiab peb tuaj yeem ua qhov ntawd siv cov kab tag nrho lub sij hawm ntawm kab tag nrho faib los ntawm qhov loj tag nrho (N). Piv txwv li, rau cell a xav tau tus nqi yuav yog (a+b+c)(a+d+g)/N.

Ib tug kuj yuav nug, koj yuav ua li cas nrhiav tau tus nqi xav tau hauv chi square xeem ntawm kev ywj pheej? Peb tuaj yeem xam tus nqi xav tau ntawm ob lub npe sib txawv los ntawm kev siv cov qauv no:

  1. Qhov twg.
  2. = tus nqi xav tau.
  3. = Sum of the ith kem.
  4. = Sum of the kth kab.
  5. = Chi-Square test of Independence. = Pom tus nqi ntawm ob qhov sib txawv nominal. = Tus nqi xav tau ntawm ob lub npe sib txawv.

Tom qab ntawd, koj yuav pom qhov piv txwv li cas?

Txhawm rau xam qhov pom piv (Kem 3), faib tus naj npawb ntawm txhua cov phenotype los ntawm 26 (cov noob phenotype nrog tus lej qis tshaj). 3. Rau cov xav tias piv (Kem 4), siv 9:3:3:1, theoretical piv rau tus ntoo khaub lig dihybrid.

Cov xwm txheej rau chi square test yog dab tsi?

Cov qee - square zoo ntawm haum xeem yog tsim nyog thaum cov hauv qab no tej yam kev mob tau ntsib: Txoj kev sampling yog yooj yim random sampling. Qhov sib txawv hauv kev kawm yog categorical. Tus nqi xav tau ntawm tus lej ntawm cov qauv kev soj ntsuam hauv txhua qib ntawm qhov sib txawv yog tsawg kawg 5.

Pom zoo: