Cov txheej txheem:
Video: Vim li cas kev piav qhia thiab kev txheeb cais tseem ceeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev piav qhia Statistics
Ob leeg piav qhia thiab inferential txheeb cais pab txiav txim siab tawm ntawm kab tom qab kab ntawm cov ntaub ntawv! Siv piav txheeb cais los xaus thiab teeb tsa cov ntaub ntawv rau ib pawg uas koj xaiv. Cov txheej txheem no tso cai rau koj kom nkag siab qhov tshwj xeeb ntawm kev soj ntsuam.
Tsis tas li ntawd, vim li cas kev piav qhia thiab kev txheeb cais tseem ceeb rau qhov kev ntaus nqi?
Kev piav qhia txheeb cais yog heev tseem ceeb vim tias yog peb tsuas nthuav qhia peb cov ntaub ntawv nyoos nws yuav nyuaj rau pom tias cov ntaub ntawv tau qhia dab tsi, tshwj xeeb tshaj yog tias muaj ntau ntawm nws. Kev piav qhia txheeb cais yog li ntawd ua rau peb nthuav tawm cov ntaub ntawv hauv txoj kev muaj txiaj ntsig, uas tso cai rau kev txhais cov ntaub ntawv yooj yim dua.
Thaum twg koj yuav siv kev piav qhia lossis kev txheeb cais tsis raug? Kev piav qhia txheeb cais siv cov ntaub ntawv los muab cov lus piav qhia ntawm cov pej xeem, los ntawm kev suav lej lossis cov duab lossis cov lus. Inferential txheeb cais ua inferences thiab kwv yees txog ib tug pej xeem raws li ib tug piv txwv ntawm cov ntaub ntawv coj los ntawm cov pejxeem nyob rau hauv nqe lus nug.
Tsuas yog li ntawd, yog vim li cas inferential txheeb cais tseem ceeb?
Inferential stats yog siv los xam los ntawm cov qauv ntaub ntawv seb cov pejxeem yuav xav li cas. Inferential stats uas kuj tseem siv los txiav txim siab txog qhov tshwm sim uas qhov kev soj ntsuam yog qhov kev cia siab lossis ib qho uas tshwm sim los ntawm lub caij nyoog hauv txoj kev tshawb fawb.
Vim li cas peb thiaj siv cov ntawv txheeb cais?
Kev piav qhia txheeb cais yog siv los piav qhia txog cov yam ntxwv ntawm cov ntaub ntawv hauv kev kawm. Lawv muab cov ntsiab lus yooj yim txog cov qauv thiab kev ntsuas. Ua ke nrog cov duab yooj yim tsom xam , lawv tsim lub hauv paus ntawm txhua qhov ntau tsom xam ntawm cov ntaub ntawv. Los yog peb tuaj yeem ntsuas ntau tus neeg ntawm ib qho kev ntsuas.
Pom zoo:
Yuav ua li cas koj ua ib daim ntawv piav qhia txheeb cais hauv Excel?
Kauj ruam 1: Ntaus koj cov ntaub ntawv rau hauv Excel, hauv ib kab. Piv txwv li, yog tias koj muaj kaum yam khoom hauv koj cov ntaub ntawv teev, ntaus lawv rau hauv hlwb A1 txog A10. Kauj ruam 2: Nyem qhov "Cov ntaub ntawv" tab thiab tom qab ntawd nyem "Data Analysis" nyob rau hauv pawg tshuaj ntsuam. Kauj ruam 3: Taw qhia "Kev piav qhia Statistics" nyob rau hauv pop-up Data Analysis window
Vim li cas cov nuj nqis tseem ceeb tseem ceeb thaum qhia txog kev ntsuas?
Cov duab tseem ceeb yog qhov tseem ceeb los qhia qhov tseeb ntawm koj cov lus teb. Qhov no yog qhov tseem ceeb hauv kev tshawb fawb thiab engineering vim tias tsis muaj cov cuab yeej ntsuas tuaj yeem ua qhov ntsuas nrog 100% precision. Siv cov nuj nqis tseem ceeb tso cai rau tus kws tshawb fawb paub tias cov lus teb meej npaum li cas, lossis qhov tsis paub meej npaum li cas
Cov nqe lus twg zoo tshaj plaws piav qhia txog qhov tseem ceeb ntawm cov lus qhia muaj nuj nqis?
Qhov tsis suav nrog tus nqi ntawm ib qho kev qhia rational yog qhov tseem ceeb uas tus denominator ntawm qhov kev qhia yog xoom. Tsis tas li ntawd, tus naj npawb ntawm zeros ntawm ib tug polynomial yeej ib txwm tsawg dua los yog sib npaug rau degree ntawm lub polynomial. Yog li ntawd, tus naj npawb ntawm cov txiaj ntsig tsis suav nrog cov lus qhia muaj txiaj ntsig tsis tuaj yeem tshaj li qib ntawm tus lej
Vim li cas kev ntsuas thiab ntsuas qhov tseem ceeb hauv kev tshawb fawb txog kev lag luam?
Cov nplai tau siv ntau zaus hauv kev tshawb fawb kev lag luam vim tias lawv pab hloov cov ntaub ntawv zoo (xav, kev xav, kev xav) rau hauv cov ntaub ntawv ntau, cov lej uas tuaj yeem txheeb xyuas tau. Koj tsim ib qho kev ntsuas los ntawm kev muab cov khoom (yuav ua tau piav qhia) rau tus lej
Vim li cas nws tseem ceeb uas yuav tsum rov ua qhov kev sim thiab sim cov kev xav hauv ntau txoj kev?
Nws yog ib qho tseem ceeb rau cov kws tshawb fawb kom rov sim dua thaum ua qhov kev sim vim tias qhov kev txiav txim siab yuav tsum raug lees paub. Muaj tseeb vim tias cov txiaj ntsig ntawm txhua qhov kev xeem yuav tsum zoo sib xws. Lwm cov kws tshawb fawb yuav tsum tuaj yeem rov ua koj qhov kev sim thiab tau txais cov txiaj ntsig zoo sib xws. Tib txoj hauv kev los ntsuas qhov kev xav yog ua qhov kev sim