Video: P kaus mom yog dab tsi hauv kev txheeb cais?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txheeb cais : Ib tug yam ntxwv ntawm tus qauv. (% ntawm cov neeg tshawb fawb uas nyiam Trump). Hauv txheeb cais peb nyiam siv lub ' kaus mom ' notation to imply a txheeb cais . Peb xaiv P los sawv cev rau qhov kev faib ua feem ntawm cov pejxeem. Vim P tsis paub thiab tsis paub peb siv Phat txhawm rau txheeb xyuas qhov kev faib ua feem hauv qhov qauv.
Piv txwv li, lub ntsiab lus ntawm p lub kaus mom yog dab tsi?
Yog hais tias rov random piv txwv ntawm ib tug muab qhov luaj li cas n raug coj los ntawm cov pej xeem ntawm qhov tseem ceeb rau ib tug categorical variable, qhov kev faib ua feem nyob rau hauv qeb ntawm kev txaus siab yog. p , tiam txhais tau tias ntawm tag nrho cov piv txwv proportions ( p - kaus mom ) yog cov pejxeem proportions ( p ).
Ib tug kuj yuav nug, P lub kaus mom thiab Q lub kaus mom yog dab tsi hauv kev txheeb cais? P . qhov tshwm sim ntawm cov ntaub ntawv (lossis cov ntaub ntawv hnyav dua) tshwm sim los ntawm lub sijhawm, saib P tus nqi. p . proportions ntawm tus qauv nrog ib tug muab tus yam ntxwv. q kaus , cov kaus mom cim saum lub q txhais tau tias "kev kwv yees ntawm"
Ib sab ntawm no, koj pom P lub kaus mom hauv kev txheeb cais li cas?
Txhawm rau ua nws, koj xav tau ob tus lej. Ib qho yog tus qauv loj (n) thiab lwm qhov yog tus naj npawb ntawm qhov tshwm sim ntawm qhov xwm txheej lossis qhov ntsuas hauv nqe lus nug (X). Qhov sib npaug rau p - kaus mom yog p - kaus mom = X/n. Hauv cov lus: Koj nrhiav p - kaus mom los ntawm kev faib cov naj npawb ntawm qhov tshwm sim ntawm qhov kev tshwm sim xav tau los ntawm tus qauv loj.
P bar sawv rau dab tsi hauv kev txheeb cais?
nruab nrab feem
Pom zoo:
Lub ntsiab lus ntawm kev hloov pauv hauv kev txheeb cais yog dab tsi?
Variability hauv Statistics yog dab tsi? Variability (tseem hu ua kis los yog dispersion) yog hais txog kev nthuav tawm cov ntaub ntawv li cas. Variability muab txoj hauv kev los piav qhia ntau npaum li cas cov ntaub ntawv sib txawv thiab tso cai rau koj siv cov txheeb cais los sib piv koj cov ntaub ntawv rau lwm cov ntaub ntawv
P kaus mom thiab Q lub kaus mom yog dab tsi hauv kev txheeb cais?
P. qhov tshwm sim ntawm cov ntaub ntawv (lossis cov ntaub ntawv hnyav dua) tshwm sim los ntawm lub sijhawm, saib P qhov tseem ceeb. p. proportions ntawm tus qauv nrog ib tug muab tus yam ntxwv. q lub kaus mom, lub kaus mom lub cim saum lub q txhais tau tias 'kwv yees'
Dab tsi yog qhov ua rau muaj kev hloov pauv hauv kev tswj cov txheej txheem txheeb cais?
'Ib qho laj thawj' kev hloov pauv yog qhov kev hloov pauv uas xav tias yuav muaj nyob rau hauv cov txheej txheem ruaj khov thiab feem ntau yog vim qhov yuam kev xws li kev kaw lossis ntsuas qhov yuam kev. Cov peev txheej ntawm qhov yuam kev no yuav tshwm sim tsis hais txog lwm yam, thiab yuav ua rau muaj qhov sib txawv me ntsis ntawm kev ntsuas
Dab tsi yog qhov kev twv ua yuam kev hauv kev txheeb cais?
Qhov kev twv ua yuam kev yog qhov ua tsis tiav ntawm qee qhov kev xav tau tshwm sim. Kev twv ua ntej yuam kev, nyob rau hauv cov ntaub ntawv ntawd, tej zaum yuav raug muab tus nqi tsis zoo thiab kwv yees qhov txiaj ntsig zoo, qhov twg AI yuav raug tsim los sim ua kom nws cov qhab nia siab tshaj plaws
Koj pom P lub kaus mom li cas hauv lub sijhawm kev ntseeg siab?
Kev ntseeg siab luv rau qhov piv txwv 2: Cov kauj ruam Z-tus nqi uas muaj thaj tsam ntawm. 475 yog 1.96. Kauj Ruam 3: Faib tus naj npawb ntawm cov xwm txheej los ntawm tus lej ntawm kev sim kom tau txais "P-lub kaus mom" tus nqi: 24/160 = 0.15