Hais lus, feem ntau yog tias kev faib cov ntaub ntawv yog skewed rau sab laug, tus txhais tau tsawg dua li qhov nruab nrab, uas feem ntau tsawg dua hom. Yog tias qhov kev faib tawm ntawm cov ntaub ntawv yog skewed rau sab xis, hom feem ntau tsawg dua qhov nruab nrab, uas tsawg dua qhov nruab nrab.
Vim li cas qhov nruab nrab tsis tshua cuam tshuam los ntawm cov ntaub ntawv skewed?
Vim li cas qhov nruab nrab cuam tshuam tsawg dua los ntawm cov ntaub ntawv skewed tshaj qhov txhais tau tias? Txawm li cas los xij, raws li cov ntaub ntawv ua skewed qhov txhais tau poob nws lub peev xwm los muab qhov chaw nruab nrab zoo tshaj plaws rau cov ntaub ntawv vim tias cov ntaub ntawv skewed yog rub nws tawm ntawm tus nqi raug.
Vim li cas qhov nruab nrab zoo dua rau cov ntaub ntawv skewed?
Rau qhov kev faib tawm uas muaj outliers los yog skewed, qhov nruab nrab feem ntau yog qhov nyiam ntsuas qhov nruab nrab nyiam vim qhov nruab nrab tiv taus ntau dua li qhov txhais tau … Nco ntsoov tias qhov nruab nrab yog rub mus rau qhov kev taw qhia ntawm qhov skewness (piv txwv li, kev taw qhia ntawm tus Tsov tus tw).
Thaum skewed mus rau qhov txhais tau tias yog nruab nrab?
Rau txoj cai skewed faib, qhov txhais tau tias feem ntau ntau dua li qhov nruab nrabKuj pom tias tus Tsov tus tw ntawm kev faib ntawm sab tes xis (zoo) sab ntev dua li ntawm sab laug tes. Los ntawm lub thawv thiab daim duab nplawm peb kuj tuaj yeem pom tias qhov nruab nrab yog ze rau thawj quartile dua li peb lub quartile.
Cov ntaub ntawv skewness cuam tshuam li cas?
Kev cuam tshuam ntawm skewness
Yog tias muaj cov ntaub ntawv skewness ntau dhau, ces ntau tus qauv ntsuas tsis ua haujlwm tab sis yog vim li cas. Yog li nyob rau hauv cov ntaub ntawv skewed, tus Tsov tus tw cheeb tsam yuav ua raws li ib tug outlierrau tus qauv statistical thiab peb paub tias outliers adversely cuam tshuam tus qauv kev ua tau zoo tshwj xeeb tshaj yog regression-raws li qauv.
