Cov txheej txheem:
Video: Dab tsi yog qhov kev ntsuas ntawm lub hauv paus nyiam rau cov ntaub ntawv uas tsis yog pawg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub sij hawm Central nyiam hais txog qhov nruab nrab, los yog ib txwm, tus nqi ntawm ib txheej cov ntaub ntawv , uas yog feem ntau ntsuas los ntawm kev siv peb m's: txhais tau tias, nruab nrab, thiab hom. Qhov nruab nrab, nruab nrab, thiab hom yog hu ua tus ntsuas qhov nruab nrab nyiam.
Hauv qhov no, qhov kev ntsuas ntawm lub hauv paus nyiam rau cov ntaub ntawv ua pawg yog dab tsi?
Mean, Median, Hom: Kev ntsuas ntawm Central Tendency . MEAN Mean rau Grouped Data Grouped cov ntaub ntawv yog cov cov ntaub ntawv los yog cov qhab nia uas tau teeb tsa hauv kev faib tawm zaus.
Ib yam li ntawd, koj yuav daws tau li cas rau cov ntaub ntawv ungrouped? Cov kauj ruam
- Sau thiab suav koj cov ntaub ntawv. Rau txhua pawg ntawm cov ntaub ntawv muaj nuj nqis, qhov nruab nrab yog qhov ntsuas ntawm tus nqi nruab nrab.
- Nrhiav cov lej ntawm cov ntaub ntawv muaj nuj nqis. Thawj kauj ruam ntawm kev nrhiav qhov txhais tau tias yog xam cov lej ntawm tag nrho cov ntsiab lus ntawm cov ntaub ntawv.
- Faib mus nrhiav qhov txhais tau tias. Thaum kawg, faib cov lej los ntawm tus lej ntawm qhov tseem ceeb.
Tsis tas li ntawd, dab tsi yog cov qauv siv los nrhiav qhov nruab nrab nruab nrab thiab hom rau ungrouped cov ntaub ntawv?
Cov ntsiab lus
- Rau cov ntaub ntawv sib koom ua ke, peb tsis tuaj yeem pom qhov tseeb Mean, Nruab Nrab thiab Hom, peb tsuas tuaj yeem muab kwv yees.
- Txhawm rau kwv yees tus Mean siv cov ntsiab lus nruab nrab ntawm cov chav kawm ib ntus: Kev kwv yees kwv yees = Sum ntawm (Midpoint × Zaus) Sum of Freqency.
- Kev kwv yees siv nruab nrab: kwv yees li nruab nrab = L + (n/2) − BG × w.
- Txhawm rau kwv yees hom siv:
Tus qauv ntawm hom yog dab tsi rau pawg cov ntaub ntawv?
Peb tus xib hwb qhia a qauv kom paub hom , uas yog Z = L1 + (F1-F0) / (2F1-F0-F2) * i qhov twg: L1 = qis txwv ntawm chav kawm modal F1 = modal chav kawm zaus. F2 = tsuas yog tom qab cov chav kawm modal zaus. F0 = nyuam qhuav dhau los ntawm cov chav kawm modal zaus.
Pom zoo:
Koj puas ntxiv cov kua qaub rau hauv lub hauv paus lossis lub hauv paus rau cov kua qaub?
Ntxiv cov kua qaub ua kom cov concentration ntawm H3O + ions hauv cov tshuaj. Ntxiv ib lub hauv paus txo cov concentration ntawm H3O + ions hauv cov tshuaj. Cov kua qaub thiab lub hauv paus zoo li cov tshuaj tiv thaiv. Yog hais tias lub hauv paus yog ntxiv rau cov kua qaub, cov tshuaj yuav tsis acidic thiab txav mus rau nruab nrab ntawm pH nplai
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Cov yam ntxwv ntawm cov ntaub ntawv twg yog qhov ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis heev?
Variation: Ib qho kev ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis sib txawv. ? Kev faib tawm: Cov xwm txheej lossis cov duab ntawm kev sib kis ntawm cov ntaub ntawv hla ntau qhov tseem ceeb (xws li tswb-puab). ? Outliers: Cov qauv piv txwv uas nyob deb heev ntawm feem ntau ntawm lwm cov qauv nqi
Thaum muab piv cov qauv sau rau ib tus neeg raug liam cov ntaub ntawv lub hnub nyoog sib txawv ntawm cov ntaub ntawv yuav tsum tsis pub tshaj kaum ob lub hlis?
Thaum piv cov qauv sau rau tus neeg raug liam? cov ntaub ntawv, lub hnub nyoog sib txawv ntawm cov ntaub ntawv yuav tsum tsis pub ntau tshaj rau rau kaum ob lub hlis. Tus lej txaus ntawm tus qauv yog qhov tseem ceeb rau kev txiav txim siab qhov tshwm sim ntawm kev sib piv
Dab tsi yog cov cuab yeej lossis cov ntaub ntawv uas tus Kws Tshawb Fawb xav tau los txheeb xyuas cov ntaub ntawv nug?
Cov ntaub ntawv raug nug hauv chav kuaj ua txhaum cai yog nruab nrog lub tshuab ntsuas ntsuas, ntsuas cov duab digital, infrared thiab ultraviolet lub teeb ci, cov cuab yeej tshuaj ntsuam video thiab cov cuab yeej tshwj xeeb suav nrog cov khoom siv hluav taws xob tshawb pom electrostatic (EDD) thiab cov khoom siv los ua chemistry