Video: Dab tsi yog tus cwj pwm tswj cov kab kos?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov kab kos yog ib txheej ntawm tswj kab kos tsim tshwj xeeb rau Yam ntxwv cov ntaub ntawv (piv txwv li suav cov ntaub ntawv). Cov kab kos duab saib xyuas cov txheej txheem qhov chaw thiab kev hloov pauv raws sijhawm hauv ib qho daim duab.
Xav txog qhov no, dab tsi yog ob hom kev tswj cov kab kos rau cov cwj pwm?
P, np, c, u tswj kab kos hu ua attribute tswj kab kos . plaub no tswj kab kos yog siv thaum koj muaj "suav" cov ntaub ntawv. Muaj ob yooj yim hom ntawm yam ntxwv data: yog/no hom cov ntaub ntawv thiab suav cov ntaub ntawv. Cov hom ntawm cov ntaub ntawv koj muaj txiav txim qhov hom ntawv tswj koj siv.
Tsis tas li ntawd, qhov sib txawv ntawm P daim duab thiab cov kab kos raws li kev tswj hwm yog dab tsi? Cov cwj pwm tswj cov kab kos rau cov ntaub ntawv binomial Lub ntsiab qhov sib txawv ntawm P thiab NP kab kos yog qhov ntsuas ntsug. P daim duab qhia qhov kev faib ua feem ntawm qhov tsis sib xws ntawm cov y-axis. NP kab kos qhia tag nrho cov naj npawb ntawm qhov tsis sib haum xeeb ntawm y-axis.
Ib yam li ntawd, dab tsi yog daim ntawv tswj kev hloov pauv?
Variables tswj kab kos cov ntaub ntawv txuas ntxiv ntsuas cov txheej txheem, xws li qhov ntev lossis siab, nyob rau hauv lub sijhawm txiav txim ua ntu zus. Piv txwv li, attribute tswj kab kos cov ntaub ntawv suav nrog, xws li tus lej ntawm qhov tsis xws luag lossis cov khoom puas.
Dab tsi yog tus cwj pwm tswj cov kab kos suav cov lej ntawm cov khoom tsis raug?
Tswj cov kab kos nrog cov tus lej ntawm qhov tsis xws luag los yog nonconformities hu ua c kab kos (rau suav ). Tswj cov kab kos nrog cov proportions los yog feem ntawm cov khoom puas npe p kab kos (rau proportion). Muaj dua daim duab uas tuav qhov tsis xws luag per unit, npe u daim duab (rau unit).
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Dab tsi yog ob hom kev tswj cov kab kos rau cov cwj pwm?
Lub p, np, c thiab u tswj kab kos yog hu ua tus cwj pwm tswj kab kos. Cov kab ntawv tswj plaub no yog siv thaum koj muaj ' suav' cov ntaub ntawv. Muaj ob hom kev qhia tus cwj pwm: yog / tsis muaj cov ntaub ntawv thiab suav cov ntaub ntawv. Hom ntaub ntawv koj tau txiav txim siab hom kev tswj daim ntawv koj siv