Percentile vs Feem pua
Percentile thiab feem pua yog qhov tseem ceeb thaum piav txog qhov ntau. Qhov feem pua yog ib lub tswv yim lej uas tso cai rau kev sib piv ntawm cov feem sib txawv thiab kev nkag siab yooj yim dua. Percentile yog ib lub tswv yim kev txheeb cais uas qhia txog ib qho kev sib txuas uas muaj feem pua ntawm cov pej xeem / kev faib tawm.
Puas
Percentage hauv lej yog ib lub tswv yim siv los sau thiab qhia meej cov ntaub ntawv ntsig txog cov feem thiab qhov sib piv. Feem ntau, feem pua ntawm qee qhov ntau yog ib feem ntawm 100. Piv txwv li xav txog qhov feem pua 5%. Qhov no yog sib npaug rau feem 5/100. Txij li tus lej puas yog lub zog ntawm kaum, kev ua lej suav tau yooj yim, thiab ib feem cuam tshuam nrog ntau yog yooj yim to taub.
Cov qauv dav dav rau kev suav cov feem pua yuav muab tau raws li:
x/y × 100=_ %
Ib feem lossis qhov piv tau muab faib ua pua muab qhov feem pua. Qhov feem pua tus nqi feem ntau yog tus nqi ntawm 0 thiab 100. Txawm li cas los xij, qhov no tuaj yeem txuas ntxiv mus rau qhov muaj nuj nqis tshaj 100. Qhov feem pua yog ib txwm qhia los ntawm kev tso tus lej cim % ntawm sab xis ntawm tus lej. Tus x thiab y tuaj yeem yog tus lej tiag tiag, tshwj tsis yog y tsis suav nrog tus nqi 0. Tus nqi tiag tiag ntawm feem (x/y) nyob ntawm qhov teeb meem txhawj xeeb.
Txhua feem lossis qhov piv tau hloov pauv mus rau feem pua. Qhov no muab txoj hauv kev yooj yim ntawm kev sib piv cov feem lossis qhov sib piv vim tias txhua feem pua sawv cev ib feem ntawm ib puas (tus denominator yeej ib txwm 100).
Percentile
Percentile yog tus nqi ntawm lossis qis dua uas qee feem pua ntawm kev faib tawm dag. Muaj ob peb feem ntau siv txhais cov feem pua. Yog hais tias ib qho khoom nyob hauv qhov feem pua nth, nws txhais tau tias n% ntawm qhov kev faib tawm nyob hauv qab lub ntsiab lus.
Piv txwv li, yog tias tus menyuam kawm ntawv nyob hauv 80 feem pua ntawm kev xeem lej, nws txhais tau tias 80% ntawm cov tub ntxhais kawm tau qhab nia hauv qab tus menyuam kawm ntawv.
25 feem pua yog tseem hu ua thawj quartile, thiab 50 thiab 75 feem pua yog thib ob thiab thib peb quartile raws li.
Percentile thiab feem pua sib txawv yog dab tsi?
• Feem pua muab ntau npaum li ib feem ntawm ib puas thaum feem pua muab rau koj cov feem pua uas nyob hauv qab cov qhab-nees lossis tus nqi ntawm qhov muab faib.
• Percentile yog ib lub tswvyim raws li feem pua.
• Cov feem pua yuav suav tau hauv ib feem ntawm qhov feem pua ntawm cov ntsiab lus tsuas yog thaum siv rau cov pej xeem (xws li cov qhab nia ntawm cov neeg ntaus pob tawb qis dua 30 xyoo)
• Percentiles cais cov pejxeem ua 100 subsets.
