Dab tsi yog qhov zoo r 2 tus nqi?
Dab tsi yog qhov zoo r 2 tus nqi?

Video: Dab tsi yog qhov zoo r 2 tus nqi?

Video: Dab tsi yog qhov zoo r 2 tus nqi?
Video: Leng Yang - Yog Vim Dab Tsi (Official Full Song | Nkauj Tawm Tshiab) 2020/05/24 2024, Kaum ib hlis
Anonim

R-squared yog ib txwm nyob nruab nrab ntawm 0 thiab 100%: 0% sawv cev rau tus qauv uas tsis piav qhia txog qhov kev hloov pauv hauv cov lus teb hloov pauv nyob ib puag ncig nws txhais tau tias. Qhov nruab nrab ntawm qhov sib txawv ntawm qhov sib txawv kwv yees qhov sib txawv ntawm qhov sib txawv nrog rau tus qauv regression.

Ntawm no, tus nqi zoo R squared yog dab tsi?

R - squared yog ib txwm nyob nruab nrab ntawm 0 thiab 100%: 0% qhia tias tus qauv piav qhia tsis muaj qhov sib txawv ntawm cov ntaub ntawv teb nyob ib puag ncig nws txhais tau tias. 100% qhia tias tus qauv piav qhia txhua qhov sib txawv ntawm cov ntaub ntawv teb nyob ib puag ncig nws txhais tau tias.

Qhov thib ob, tus nqi qis R 2 txhais li cas? A qis R-squared tus nqi qhia tias koj qhov kev hloov pauv ywj pheej tsis tau piav qhia ntau hauv qhov kev hloov pauv ntawm koj qhov kev sib txawv ntawm qhov sib txawv - txawm hais tias qhov tseem ceeb ntawm qhov sib txawv, qhov no qhia rau koj paub tias tus txheeb ze sib txawv, txawm tias tseem ceeb, tsis suav nrog ntau ntawm cov txhais tau tias ntawm koj

Kuj kom paub, tus nqi r2 ntawm 0.9 txhais li cas?

Qee cov kws txheeb cais nyiam ua haujlwm nrog cov tus nqi ntawm R2 , uas tsuas yog qhov sib txheeb coefficient squared, los yog muab faib los ntawm nws tus kheej, thiab yog lub npe hu ua coefficient ntawm kev txiav txim siab. Ib R2 tus nqi ntawm 0.9 , piv txwv li, txhais tau tias tias 90 feem pua ntawm qhov kev hloov pauv hauv cov ntaub ntawv y yog vim kev hloov pauv hauv cov ntaub ntawv x.

Puas siab dua R Squared zoo dua?

Feem ntau, cov siab dua tus R - squared , cov zoo dua tus qauv haum koj cov ntaub ntawv.

Pom zoo: