Dab tsi yog qhov sib txuas coefficient rau kab ntawm qhov zoo tshaj plaws?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Muaj ib txoj kev ntsuas qhov "zoo ntawm haum "ntawm zoo tshaj plaws haum kab (tsawg kawg squares kab ), npe kev sib txuas coefficient . Nws yog tus lej ntawm -1 thiab 1, suav nrog, uas qhia txog kev ntsuas ntawm kev sib koom ua ke ntawm ob qhov sib txawv, thiab tseem qhia tau tias qhov kev sib raug zoo yog qhov zoo lossis tsis zoo.

Ntxiv mus, puas yog qhov sib txheeb coefficient pom zoo nrog txoj kab nqes ntawm txoj kab zoo tshaj plaws?

Tsis yog, tsis yog tias cov kev hloov pauv muaj qhov sib txawv ntawm tus qauv. Ces tus kev sib raug zoo yog sib npaug rau cov txoj kab nqes ntawm kab regression . Txwv tsis pub tus kev sib raug zoo kuj muaj cov qauv sib txawv.

Tsis tas li ntawd, txoj kab ntawm qhov zoo tshaj plaws txhais li cas? Kab ntawm Qhov Zoo Tshaj Plaws . A kab ntawm qhov zoo tshaj plaws haum (los yog "trend" kab ) yog ncaj kab uas zoo tshaj plaws sawv cev rau cov ntaub ntawv ntawm ib lub phiaj xwm scatter. Qhov no kab tuaj yeem dhau los ntawm qee cov ntsiab lus, tsis muaj cov ntsiab lus, lossis tag nrho cov ntsiab lus. Koj tuaj yeem tshuaj xyuas kab ntawm qhov zoo tshaj plaws haum nrog: 1.

Ua li no, koj piav qhia txog kev sib txheeb coefficient li cas?

Degree ntawm correlation:

• Zoo meej: Yog tias tus nqi nyob ze ± 1, ces nws hais tias yog ib qho kev sib raug zoo: raws li ib qho kev sib txawv nce, lwm qhov sib txawv kuj nce (yog tias zoo) lossis txo qis (yog tias tsis zoo).
• High degree: Yog tias tus nqi coefficient nyob nruab nrab ntawm ± 0.50 thiab ± 1, ces nws tau hais tias yog qhov sib raug zoo.

Koj yuav ua li cas thiaj paub tias qhov sib txheeb coefficient muaj zog lossis tsis muaj zog?

Thaum tus nqi r ze dua rau +1 lossis -1, nws qhia tias muaj ib zog linear kev sib raug zoo ntawm ob qhov sib txawv. A kev sib raug zoo ua 0.97 a muaj zog tsis zoo kev sib raug zoo thaum a kev sib raug zoo ntawm 0.10 yuav yog a qaug zog zoo kev sib raug zoo.