Yog cov ntaub ntawv graphs symmetrically, qhov kev faib tawm muaj xoom skewness, tsis hais ntev npaum li cas los yog rog cov tails. Peb qhov kev faib tawm qhov tshwm sim tau piav qhia hauv qab no yog qhov zoo-skewed (los yog txoj cai-skewed) kom nce qib. Kev faib tawm tsis zoo kuj tseem hu ua kev faib tawm sab laug.
txhais li cas yog skewness yog 0?
Tus nqi skewness tuaj yeem yog qhov zoo lossis qhov tsis zoo, lossis tseem tsis tau txhais. Yog tias skewness yog 0, cov ntaub ntawv zoo kawg nkaus symmetrical, txawm hais tias nws tsis zoo li cov ntaub ntawv tiag tiag hauv ntiaj teb. Raws li txoj cai dav dav ntawm tus ntiv tes xoo: Yog tias skewness tsawg dua -1 lossis ntau dua 1, qhov kev faib tawm yog skewed heev.
Thaum coefficient ntawm skewness yog xoom qhov kev faib yog?
Tus nqi ntawm xoom txhais tau tias tsis skewness txhua. Tus nqi tsis zoo loj txhais tau tias qhov kev faib tawm tsis zoo skewed. Tus nqi zoo loj txhais tau hais tias qhov kev faib tawm yog qhov zoo skewed.
Qhov twg yog qhov tseeb rau kev faib nrog xoom skewness?
Peb paub tias kev faib nrog xoom skewness yog symmetric … Qhov tseeb, qhov tsis yog --- symmetry implies xoom skewness (xav tias tus coefficient ntawm skewness muaj), tab sis xoom skewness tsis txhais hais tias symmetry.
Thaum kev faib khoom hais tias yuav skewed?
Ib qho kev faib tawm yog hais tias yuav skewed thaum cov ntaub ntawv cov ntsiab lus pawg ntau dua rau ib sab ntawm qhov ntsuas dualwm tus, tsim kom muaj qhov nkhaus uas tsis sib luag. Hauv lwm lo lus, sab xis thiab sab laug ntawm kev faib khoom yog qhov sib txawv ntawm ib leeg. Muaj ob hom skewed distributions.
