Kev txiav txim siab lub ntim ntawm cov khoom tsim tawm lossis muag yog ib qho ntawm cov haujlwm tseem ceeb uas txhua tus kws xam nyiaj txiag yuav tsum muaj peev xwm ua tau. Tias yog vim li cas thiaj li ua haujlwm nyob rau hauv uas nws yuav tsum tau nrhiav cov ntim ntawm cov khoom yog li ntau nyob rau hauv kev lag luam thiab kev kawm nyiaj txiag.
Cov Lus Qhia
Kauj ruam 1
Feem ntau, cov lus hais ntawm "ntim ntawm cov khoom lag luam" yog hais txog qhov ntim ntawm cov khoom tsim tawm lossis muag los ntawm ib qho kev lag luam rau qee lub sijhawm. Nws tuaj yeem raug hais ua lus ntau thiab ntau. Txhawm rau nrhiav qhov ntim ntawm cov khoom lag luam hauv cov ntsiab lus ntsig txog hom, khij tus nqi ntau ntxiv los ntawm tus nqi hauv paus. Kev laij tawm los ua ntau qhov nyuaj ntxiv yog tias cov khoom tsis homogeneous, thiab tus nqi, raws li, txawv nyob ntawm cov pob khoom. Hauv qhov no, nrhiav qhov ntim ntawm txhua pawg nyias thiab ntxiv cov txiaj ntsig.
Kauj ruam 2
Heev feem ntau muaj qhov xav tau los suav qhov ntim ntawm cov khoom lag luam hauv kev sib piv ntawm cov nqi. Cov nqi sib piv yog cov nqi rau xyoo tshwj xeeb lossis hnub tshwj xeeb. Lawv tuaj yeem paub kom meej thiab txhim kho lossis nrhiav tau los ntawm cov coefficients uas tsim nyog, piv txwv li, los ntawm kev nce nqi. Nyob rau hauv rooj plaub thaum koj xav nrhiav qhov ntim ntawm cov khoom hauv cov nqi sib piv, koj yuav tsum sib npaug ntawm cov khoom uas tau tsim los ntawm tus nqi ntawm ib lub xyoo, lossis kho qhov ntim ntawm cov khoom ntawm tus nqi tam sim no los ntawm coefficient uas yuav tsum tau.
Kauj ruam 3
Cov xwm txheej feem ntau tseem yog thaum koj xav nrhiav qhov ntim ntawm cov khoom muag muag nyob rau hauv ib lub sijhawm, piv txwv li, peb lub hlis twg, ib nrab xyoo lossis ib xyoos. Hauv qhov no, raws li txoj cai, cov kev hloov seem uas pib thaum pib thiab thaum xaus ntawm lub sijhawm muab tau paub. Txhawm rau nrhiav qhov ntim ntawm ntau lawm nyob rau qee lub sijhawm, rau lub ntim ntawm cov khoom lag luam tsim nyob rau ib lub sijhawm, piv txwv li ib xyoos, ntxiv cov khoom seem thaum pib ntawm lub xyoo thiab rho tawm cov khoom lag luam thaum kawg ntawm xyoo lub xyoo.
