Yuav ua li cas cumulative frequencies thiab feem pua sib txawv?

2024 Tus sau: Edward Hancock | [email protected]. Kawg hloov kho: 2023-12-16 01:32

Txawm tias qhov tseem ceeb txawv , cumulative zaus thiab feem pua yog tib yam, uas yog, lawv ob qho tib si nthuav cov lej sib txawv. Cov variables, nyob rau hauv cov ntaub ntawv no, sawv cev rau ib tug tshwj xeeb cov ntaub ntawv. Ntxiv dua thiab, graphs rau cumulative feem pua thiab cumulative zaus yog tib yam.

Ntawm no, yuav ua li cas cumulative frequencies thiab feem pua zoo tib yam?

Los ntawm Wikipedia: A feem pua yog ib qho kev ntsuas siv nyob rau hauv kev txheeb cais qhia tus nqi hauv qab no uas ib feem pua ntawm kev soj ntsuam hauv ib pawg ntawm kev soj ntsuam poob. Ib feem pua yuav tsum yog tus lej ntawm 0 thiab 100, tab sis tus txheeb ze cumulative zaus yog 100 npaug me me, vim nws yog tus lej ntawm 0 thiab 1.

Ib yam li ntawd, qhov sib txawv ntawm qhov feem pua thiab cov feem pua nce? A cumulative feem pua qhia qhov feem pua ntawm cov qhab nia ntawm thiab qis dua tus qhab nia muab. A cumulative feem pua tseem hu ua a feem pua . Yog koj tau qhab nia hauv 87^th Ib xees ntawm SAT, uas txhais tau hais tias 87% ntawm cov tub ntxhais kawm ntawv xeem thaum koj ua tau zoo ib yam lossis qis dua qhov koj tau ua.

Ib yam li ntawd, cumulative zaus feem pua yog dab tsi?

A feem pua yog ib feem pua ntawm cov ntaub ntawv. Cov feem pua yog siv los soj ntsuam seb muaj pes tsawg ntawm ib pawg ntawm cov ntaub ntawv poob rau hauv ib feem pua ntawm qhov ntau; piv txwv; ib thirth feem pua qhia cov ntaub ntawv uas dag lub 13% cim ntawm tag nrho cov ntaub ntawv teev.

Qhov ntau zaus qhia tau dab tsi?

Nquag ntau zaus yog siv los txiav txim seb tus naj npawb ntawm cov kev soj ntsuam uas nyob saum toj no (los yog hauv qab) tus nqi tshwj xeeb hauv cov ntaub ntawv teev. Cov cumulative zaus yog xam los ntawm kev ntxiv txhua zaus los ntawm a zaus faib lub rooj rau cov sum ntawm nws cov predecessors.