Average vs Weighted Average
Nruab nrab thiab qhov hnyav nruab nrab yog ob qho tib si nruab nrab tab sis suav qhov sib txawv. Txhawm rau nkag siab qhov sib txawv ntawm qhov nruab nrab thiab qhov hnyav nruab nrab, peb yuav tsum xub nkag siab lub ntsiab lus ntawm ob nqe lus. Peb txhua tus paub txog qhov nruab nrab raws li nws tau qhia ntxov heev hauv tsev kawm ntawv. Tab sis qhov nruab nrab qhov hnyav no yog dab tsi thiab nws siv dab tsi?
Average
Nws yog lub tswv yim uas yuav tsum paub txog qhov kev ua tau zoo lossis qhov tshwm sim. Yog tias muaj 10 tus tub hauv chav kawm muaj qhov hnyav sib txawv, peb suav lawv qhov hnyav nruab nrab los ntawm kev ntxiv lawv tus kheej qhov hnyav thiab muab tag nrho los ntawm 10 kom txog rau qhov hnyav nruab nrab ntawm chav kawm.
Yog li qhov nruab nrab yog qhov suav ntawm txhua tus neeg soj ntsuam muab faib los ntawm tus lej ntawm kev soj ntsuam.
Nyhav nruab nrab
Yeej, qhov hnyav nruab nrab kuj yog qhov nruab nrab nrog qhov sib txawv me ntsis uas tsis yog txhua qhov kev soj ntsuam nqa qhov hnyav sib npaug. Yog tias qhov kev soj ntsuam sib txawv muaj qhov tseem ceeb sib txawv, lossis qhov hnyav hauv qhov no, txhua qhov kev soj ntsuam tau muab faib los ntawm nws qhov hnyav thiab tom qab ntawd ntxiv. Qhov no yog ua kom coj mus rau hauv tus account qhov tseem ceeb ntawm cov kev soj ntsuam sib txawv vim lawv muaj qhov tseem ceeb ntau dua li lwm tus. Tsis zoo li qhov nruab nrab yooj yim, qhov twg tag nrho cov kev soj ntsuam muaj tus nqi tib yam, nyob rau hauv qhov hnyav nruab nrab, txhua qhov kev soj ntsuam tau muab qhov hnyav sib txawv thiab yog li qhov nruab nrab yog xam kom nco ntsoov qhov tseem ceeb ntawm txhua qhov kev soj ntsuam. Lub tswv yim yuav pom tseeb los ntawm cov piv txwv hauv qab no.
Hais piv txwv li, kev xav thiab cov tswv yim nqa qhov hnyav sib txawv hauv qhov kev xeem; Qhov hnyav nruab nrab yuav tsum raug xam los txiav txim qhov kev ua tau zoo ntawm tus menyuam kawm ntawv hauv qhov kev kawm es tsis yog siv qhov nruab nrab yooj yim xwb.
Nws yog qhov tseeb ces qhov nruab nrab tsuas yog qhov tshwj xeeb ntawm qhov hnyav qhov nruab nrab raws li txhua tus nqi muaj qhov hnyav los yog sib npaug ntawm no. Hloov pauv, qhov hnyav nruab nrab tuaj yeem raug coj los ua qhov nruab nrab uas txhua tus nqi muaj qhov hnyav sib txawv. Nws yog cov luj uas txiav txim siab qhov tseem ceeb ntawm txhua qhov ntau ntawm qhov nruab nrab. Yog li yog tias koj xav pom qhov hnyav nruab nrab ntawm ntau qhov tseem ceeb, ntawm no yog cov qauv dav dav.
Weighted average=(a1w1+a2w2+a3w3…..+anwn)/ (w1+w2+…..wn)
Ntawm 'a' yog tus nqi ntawm qhov ntau thaum w yog qhov hnyav ntawm cov khoom no.
Nws yooj yim heev los xam qhov hnyav nruab nrab siv Microsoft excel daim ntawv. Koj yuav tsum ua dab tsi yog sau qhov tseem ceeb ntawm qhov ntau thiab lawv qhov hnyav hauv cov kab uas nyob ib sab. Ua kom siv cov khoom siv mis thiab suav cov khoom ntawm ob kab uas nyob ib sab sau cov khoom hauv kab thib peb. Ntxiv rau qhov muaj nuj nqis ntawm qhov ntau thiab cov khoom siv. Siv cov mis los faib ob qhov txiaj ntsig tau thiab koj tau txais qhov hnyav nruab nrab.
