Cov txheej txheem:
Video: Koj nrhiav qhov chaw nruab nrab ntawm cov ntaub ntawv li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Koj tuaj yeem ua qhov no los ntawm kev siv qhov nruab nrab lossis nruab nrab. Qhov nruab nrab yog cov lej ntawm cov lej hauv a cov ntaub ntawv teem muab faib los ntawm tag nrho cov naj npawb ntawm cov nqi nyob rau hauv lub cov ntaub ntawv teeb. Qhov nruab nrab tuaj yeem siv los nrhiav tus qhov chaw ntawm cov ntaub ntawv thaum cov lej hauv cov cov ntaub ntawv teem tau zoo sib xws.
Hauv qhov no, koj yuav pom qhov chaw nruab nrab ntawm cov ntaub ntawv hauv kev txheeb cais li cas?
Yog tias koj raug nug kom pom qhov nruab nrab ntawm kev faib tawm hauv kev txheeb cais, koj feem ntau muaj peb txoj kev xaiv:
- Saib ntawm daim duab, lossis cov npe ntawm cov lej, thiab saib seb qhov chaw puas pom tseeb.
- Nrhiav qhov nruab nrab, qhov "nruab nrab" ntawm cov ntaub ntawv teev.
- Nrhiav qhov nruab nrab, tus lej nruab nrab.
Qhov thib ob, qhov chaw ntawm cov ntaub ntawv hauv lej yog dab tsi? Ib qho kev ntsuas ntawm nruab nrab nyiam (ntsuas ntawm chaw ) yog tus nqi uas sim piav qhia txog ib pawg cov ntaub ntawv los ntawm kev txheeb xyuas qhov chaw nruab nrab ntawm lub cov ntaub ntawv teeb (raws li tus neeg sawv cev ntawm tus nqi "tus nqi" hauv lub teeb). Peb paub txog kev ntsuas ntawm lub hauv paus nyiam hu ua qhov nruab nrab, nruab nrab thiab hom.
Ib yam li ntawd, nws yog nug, koj yuav nrhiav qhov ntsuas ntawm qhov chaw li cas?
Plaub ntsuas ntawm qhov chaw yog txhais tau tias, nruab nrab, hom, thiab nruab nrab. Mean – Qhov nruab nrab yog qhov koj paub li qhov nruab nrab. Nws raug xam los ntawm kev noj tag nrho cov txiaj ntsig hauv ib txheej thiab faib lawv los ntawm tag nrho cov txiaj ntsig hauv cov txheej txheem ntawd. Qhov nruab nrab yog rhiab heev rau outliers (ntau dua ntawm outliers hauv me ntsis).
Lub hom puas sawv cev rau qhov chaw ntawm cov ntaub ntawv?
Cov hom (s) ua ( ua ) tsis yog sawv cev rau qhov chaw vim nws yog qhov tsawg tshaj plaws cov ntaub ntawv tus nqi. Nrhiav tus txhais tau tias , median, thiab hom ntawm cov ntaub ntawv teem, yog ua tau. Yog ib qho kev ntsuas nrhiav tsis tau lossis ua tsis yog sawv cev rau qhov chaw ntawm cov ntaub ntawv , piav qhia vim li cas.
Pom zoo:
Yuav ua li cas koj pom qhov nruab nrab thiab nruab nrab ntawm daim duab peb sab?
Txhawm rau nrhiav qhov chaw nruab nrab ntawm daim duab peb sab, nws yog qhov yooj yim tshaj plaws los kos tag nrho peb qhov nruab nrab thiab nrhiav lawv qhov kev sib tshuam. Txhawm rau kos qhov nruab nrab ntawm daim duab peb sab, ua ntej nrhiav qhov nruab nrab ntawm ib sab ntawm daim duab peb sab. Kos ib kab ntu uas txuas qhov taw tes no mus rau qhov rov qab vertex
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
Koj pom qhov nruab nrab thiab nruab nrab hauv tableau li cas?
Kev sib txuas lus cov ntaub ntawv nrog Tableau los ntawm Ben Jones Qhov nruab nrab (lossis nruab nrab) yog txiav txim siab los ntawm kev suav tag nrho cov txiaj ntsig hauv cov ntaub ntawv teev thiab faib los ntawm tus lej ntawm qhov tseem ceeb. Qhov nruab nrab yog tus nqi nruab nrab hauv cov ntaub ntawv teev nyob rau hauv uas qhov tseem ceeb tau muab tso rau hauv kev txiav txim ntawm qhov loj
Koj ua li cas sib npaug redox cov tshuaj tiv thaiv hauv acidic thiab nruab nrab nruab nrab?
Acid Conditions Solution. Kauj Ruam 1: Sib cais ib nrab cov lus teb. Kauj Ruam 2: Ntsuas cov ntsiab lus uas tsis yog O thiab H. Kauj Ruam 3: Ntxiv H2O kom sib npaug ntawm cov pa. Kauj Ruam 4: Sib npaug hydrogen los ntawm kev ntxiv protons (H +). Kauj Ruam 5: Ntsuas tus nqi ntawm txhua qhov sib npaug nrog electrons. Kauj Ruam 6: Ntsuas cov tshuaj tiv thaiv kom cov electrons sib npaug