Skewness yog ntsuas ntawm symmetry, lossis ntau dua qhov tseeb, qhov tsis muaj qhov sib luag. … Kurtosis yog ib qho kev ntsuas seb cov ntaub ntawv puas hnyav-tailed lossis lub teeb-tailed txheeb ze rau ib qho kev faib tawm. Ntawd yog, cov ntaub ntawv teev nrog siab kurtosis yuav muaj cov tails hnyav, lossis outliers.
Kev sib raug zoo ntawm skewness thiab kurtosis yog dab tsi?
NO, tsis muaj kev sib raug zoo ntawm skew thiab kurtosis Lawv ntsuas cov khoom sib txawv ntawm kev faib khoom. Kuj tseem muaj lub sijhawm siab dua. Thawj lub sijhawm ntawm kev faib khoom yog qhov nruab nrab, lub sijhawm thib ob yog tus qauv sib txawv, qhov thib peb yog skew, plaub yog kurtosis.
skewness thiab kurtosis qhia peb li cas?
Skewness tseem ceeb ntsuas qhov sib luag ntawm kev faib khoom, thaum kurtosis txiav txim siab qhov hnyav ntawm cov tis tis.” Kev nkag siab zoo ntawm cov ntaub ntawv yog qhov tseem ceeb heev. Nws pab kom nkag siab qhov twg cov ntaub ntawv feem ntau yog dag thiab txheeb xyuas cov outliers hauv cov ntaub ntawv muab.
Koj txhais li cas kurtosis thiab skewness?
Rau skewness, yog tias tus nqi ntau dua + 1.0, qhov kev faib yog txoj cai skewed. Yog tias tus nqi qis dua -1.0, qhov kev faib tawm yog sab laug skewed. Rau kurtosis, yog tias tus nqi ntau dua + 1.0, qhov kev faib tawm yog leptokurtik. Yog tias tus nqi tsawg dua -1.0, qhov kev faib tawm yog platykurtik.
Yuav ua li cas thiaj zoo skewness thiab kurtosis?
Qhov txiaj ntsig rau asymmetry thiab kurtosis nruab nrab ntawm -2 thiab +2 raug txiav txim siab lees paub txhawm rau ua pov thawj ib txwm tsis muaj kev faib tawm (George & Mallery, 2010). Cov plaub hau et al. (2010) thiab Bryne (2010) sib cav tias cov ntaub ntawv raug suav tias yog qhov qub yog tias skewness nyob nruab nrab ntawm -2 txog +2 thiab kurtosis nyob nruab nrab ntawm -7 txog +7.
