Ib qho kev qhia dav dav rau skewness yog tias tus lej ntau dua +1 lossis qis dua -1, qhov no yog qhov qhia txog kev faib tawm ntau yam. Rau kurtosis, cov lus qhia dav dav yog tias yog tus lej ntau dua +1, qhov kev faib tawm tau nce siab heev.
Tus nqi siab tshaj ntawm skewness yog dab tsi?
Raws li txoj cai dav dav ntawm tus ntiv tes xoo: Yog tias skewness yog tsawg dua -1 lossis ntau dua 1, qhov kev faib tawm yog skewed heev. Yog tias skewness nyob nruab nrab ntawm -1 thiab -0.5 lossis nruab nrab ntawm 0.5 thiab 1, qhov kev faib tawm yog me ntsis skewed. Yog hais tias skewness nyob nruab nrab ntawm -0.5 thiab 0.5, qhov kev faib yog kwv yees li symmetrical.
Yuav ua li cas skewness tau txais?
Txais qhov txiaj ntsig ntawm skewness poob nruab nrab ntawm − 3 thiab + 3, thiab kurtosis yog qhov tsim nyog los ntawm ntau yam − 10 txog + 10 thaum siv SEM (Brown, 2006).
Yuav ua li cas koj thiaj paub yog tias skewness tseem ceeb?
Ib txoj hauv kev los txiav txim siab yog tias qib ntawm skewness yog "tseem ceeb skewed" yog piv tus lej tus nqi rau "Skewness" nrog ob zaug "Standard yuam kev ntawm Skewness"thiab suav nrog qhov ntau ntawm rho tawm ob zaug ntawm Std. yuam kev ntawm Skewness ntxiv rau ob zaug Std.
qhov siab dua txhais li cas?
Skewness yog hais txog asymmetry (lossis "tapering") hauv kev faib cov ntaub ntawv piv txwv: … Hauv qhov kev faib tawm, feem ntau (tab sis tsis tas li) qhov txhais tau yog ntau dua li qhov nruab nrab, lubsib npaug, qhov nruab nrab yog ntau dua li hom; Nyob rau hauv rooj plaub no tus skewness yog ntau tshaj xoom.
