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Video: Koj ua li cas txoj cai ntxiv rau qhov tshwm sim?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txoj Cai Ntxiv 2: Thaum ob qhov xwm txheej, A thiab B, yog tsis yog kev sib koom ua ke, muaj qee qhov sib tshooj ntawm cov xwm txheej no. Cov qhov tshwm sim uas A lossis B yuav tshwm sim yog qhov sum ntawm qhov tshwm sim ntawm txhua qhov xwm txheej, rho tawm qhov tshwm sim ntawm qhov sib tshooj. P(A or B) = P(A) + P(B) - P(A thiab B)
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog qhov thiab txoj cai hauv qhov tshwm sim?
Txoj cai (rau THIAB): n(A thiab B) txhais tau tias tus naj npawb ntawm qhov tshwm sim hauv ob qho tib si A thiab B. n(S) txhais tau tias tag nrho cov txiaj ntsig tau tshwm sim (qhov chaw piv txwv). Ib tug tsuav yog dov. Dab tsi yog qhov qhov tshwm sim tias tus lej yog tus lej thiab tsawg dua 4?
Koj tuaj yeem siv txoj cai sib ntxiv li cas txhawm rau nrhiav qhov tshwm sim ntawm qhov tshwm sim A lossis B? Txoj cai ntawm Ntxiv Cov qhov tshwm sim uas Kev tshwm sim A los yog Kev tshwm sim B tshwm sim yog sib npaug rau cov qhov tshwm sim uas Kev tshwm sim A tshwm sim ntxiv rau qhov tshwm sim uas Kev tshwm sim B tshwm sim rho tawm qhov tshwm sim tias ob leeg Cov xwm txheej A thiab B tshwm sim. P(A ∪ B ) = P(A) + P( B ) - P(A ∩ B ) Ib tug tub kawm ntawv mus rau lub tsev qiv ntawv.
Hais txog qhov no, 3 txoj cai ntawm qhov tshwm sim yog dab tsi?
Muaj peb yooj yim txoj cai txuam nrog qhov tshwm sim : qhov sib ntxiv, sib npaug, thiab ntxiv txoj cai . Qhov ntxiv txoj cai yog siv los xam cov qhov tshwm sim ntawm qhov xwm txheej A lossis qhov xwm txheej B tshwm sim; peb qhia nws li: P (A lossis B)
Dab tsi yog 5 txoj cai ntawm qhov yuav tshwm sim?
Cov cai yooj yim tshwm sim
- Txoj Cai Muaj Peev Xwm Ib (Rau ib qho xwm txheej A, 0 ≤ P(A) ≤ 1)
- Probability Rule Ob (Qhov suav ntawm qhov tshwm sim ntawm txhua qhov tshwm sim tau yog 1)
- Txoj Cai Muaj Peev Xwm Thib Peb (Txoj Cai Ntxiv)
- Muaj feem cuam tshuam nrog ntau yam xwm txheej.
- Probability Rule Plaub (Txoj Cai Ntxiv rau Cov Txheej Txheem Tsis Txaus Siab)
- Nrhiav P (A thiab B) siv Logic.
Pom zoo:
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Koj piav qhia qhov tshwm sim rau cov tub ntxhais kawm li cas?
Qhov tshwm sim feem ntau yog qhia raws li qhov piv ntawm tus lej ntawm qhov yuav tshwm sim piv nrog rau tag nrho cov txiaj ntsig tau. Nug cov menyuam kawm ntawv seb lawv puas tuaj yeem muab piv txwv txog qhov yuav tshwm sim. Txhawm rau pab cov tub ntxhais kawm nkag siab txog qhov yuav tshwm sim, ua haujlwm ntawm cov teeb meem hauv qab no hauv chav kawm: Xav txog tias koj tau caij dav hlau