Yog kurtosis yog ntau dua 3, ces cov ntaub ntawv muaj cov tails hnyav dua li ib txwm faib (ntau dua hauv cov tails). Yog tias kurtosis tsawg dua 3, ces cov ntaub ntawv muaj cov tails sib zog dua li ib txwm faib (tsawg dua hauv cov tails). Ceev faj ntawm no.
Tus nqi kurtosis zoo yog dab tsi?
Ib tus qauv ib txwm faib muaj kurtosis ntawm 3 thiab tau lees paub tias yog mesokurtic. Ib qho ntxiv kurtosis (>3) tuaj yeem pom tau tias yog "tswb" nyias nrog lub ncov siab thaum qhov qis kurtosis sib haum mus rau qhov dav ntawm lub ncov thiab "thickening" ntawm cov tails. Kurtosis >3 tau lees paub tias yog leptokurtic thiab <3.
Puas siab kurtosis zoo los phem?
Kurtosis tsuas yog siv tau thaum siv nrog rau tus qauv sib txawv. Nws yog qhov ua tau tias kev nqis peev yuav muaj siab kurtosis (phem), tab sis tag nrho cov qauv sib txawv yog qis (zoo). Hloov pauv, ib tus yuav pom kev nqis peev nrog qis kurtosis (zoo), tab sis tag nrho cov qauv sib txawv yog siab (tsis zoo).
Puas zoo kurtosis zoo?
Thaum kurtosis ntau dhau yog qhov zoo, nws muaj leptokurtic distribution. Cov tails ntawm qhov kev faib tawm no hnyav dua li qhov kev faib tawm ib txwm muaj, qhia tias muaj kev pheej hmoo hnyav. Cov nyiaj rov qab los ntawm kev nqis peev nrog leptocurtic faib lossis qhov zoo tshaj kurtosis yuav muaj txiaj ntsig zoo heev.
Tus kab mob kurtosis zoo txhais li cas?
Rau cov tub ua lag luam, siab kurtosis ntawm kev xa rov qab cuam tshuamtus neeg ua lag luam yuav ntsib qee zaus huab cua xa rov qab (txawm qhov zoo lossis tsis zoo), hnyav dua li ib txwm + lossis - peb tus qauv sib txawv los ntawm qhov txhais tau tias kwv yees los ntawm kev faib tawm ib txwm rov qab.
