Cov txheej txheem:
- Is UMVUE unique?
- Puas tus kwv tsis ncaj ncees ib txwm muaj?
- YPuas yog UMVUE thiab MVUE ib yam?
- Puas muaj ntau yam kev kwv yees tsis ncaj ncees?
Video: Puas yog cov kwv yees tsis ncaj ncees lawm?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Theorem hais tias txhua qhov kev kwv yees uas tsis ncaj ncees rau qhov tsis paub ntau npaum li cas thiab qhov ntawd nyob ntawm cov ntaub ntawv tsuas yog dhau los ntawm kev ua tiav, cov ntaub ntawv txaus yog qhov kev kwv yees zoo tshaj plaws uas tsis muaj kev kwv yees ntawm qhov ntawd ntau.
Is UMVUE unique?
1 Teb. Feem ntau, an UMVUE yog qhov tseem ceeb tshwj xeeb. Qhov kwv yees koj muab tsis yog UMVUE txawm li cas los xij, qhov tseeb nws tsis yog tsis ncaj ncees lawm !! Daim ntawv ceeb toom tias E[1−X]=1−E[X]=1−p muab tias peb qhov sib txawv tsis sib xws yog Bernoulli nrog qhov ntsuas p.
Puas tus kwv tsis ncaj ncees ib txwm muaj?
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias ib qho kev sib txawv yam tsawg kawg nkaus uas tsis muaj kev kwv yees yuav tsis muaj nyob ib txwm muaj, thiab txawm tias nws ua li cas los peb yuav nrhiav tsis tau. Tsis muaj ib txoj hauv kev uas yuav ib txwm tsim MVUE. Ib txoj hauv kev muaj txiaj ntsig los nrhiav MVUE pib los ntawm kev nrhiav cov ntaub ntawv txaus rau qhov ntsuas.
YPuas yog UMVUE thiab MVUE ib yam?
Nyob rau hauv kev txheeb cais qhov tsawg kawg nkaus-variance unbiased kwv yees ( MVUE) los yog uniformly yam tsawg kawg nkaus-variance unbiased kwv yees (UMVUE) yog ib tug unbiased kwv yees uas muaj qis variance dua lwm yam unbiased kwv yees rau tag nrho cov txiaj ntsig tau ntawm qhov ntsuas.
Puas muaj ntau yam kev kwv yees tsis ncaj ncees?
Tus naj npawb ntawm cov kwv yees yog suav tsis txheeb vim R muaj lub cim ntawm qhov txuas ntxiv. Thiab qhov ntawd tsuas yog ib txoj hauv kev kom tau txais ntau qhov kev kwv yees tsis ncaj ncees. Yog li tus kwv kwv tsis ncaj ncees.
Pom zoo:
Puas yog kev kwv yees kwv yees analytics?
Kev kwv yees yog ib qho txheej txheem uas siv cov ntaub ntawv thiab kwv yees tus nqi yav tom ntej rau cov ntaub ntawv saib nws cov cim tshwj xeeb. … Kev tshuaj xyuas kwv yees nyob rau hauv ntau yam ntawm cov tswv yim thiab kwv yees yav tom ntej tus cwj pwm- tsis yog tus lej xwb .
Puas yog kev ncaj ncees lossis tsis ncaj ncees?
Thaum peb saib qhov sib txawv ntawm ob nqe lus, qhov sib txawv ntawm qhov tseem ceeb yog kev coj ncaj ncees yog kev coj ncaj ncees thiab muaj kev coj zoo whereas kev tsis ncaj ncees yog tag nrho qhov ntxeev ntawm nws Ib Lub hauv paus ntsiab lus ntawm kev ncaj ncees nyob rau hauv ib lub zej zog tej zaum yuav tsis ncaj ncees nyob rau hauv lwm haiv neeg thiab cov no txawv ntawm ib haiv neeg mus rau lwm tus .
Puas yog nws tsis ncaj ncees lossis tsis ncaj ncees?
As adjectives qhov txawv ntawm discourteous thiab uncourteous. yog hais tias discourteous yog impulite; tsis muaj kev saib xyuas rau lwm tus thaum tsis ncaj ncees tsis coj ncaj ncees; tsis ncaj ncees, rude . Puas yog lus tsis ncaj ncees?
Puas yog kwv yees li kev kwv yees?
Kev kwv yees suav tau tias yog 'zoo me ntsis tshaj qhov kev kwv yees'. Yog tias qhov kev kwv yees yog qhov tsis sib xws, kev kwv yees kev kawm yuav yog me ntsis ze dua. Kev kwv yees, lossis kwv yees, yuav tsum muab cov lus teb uas yog qhov tseeb, hais rau qhov ze tshaj 10 lossis100, yog tias koj ua haujlwm nrog tus lej loj dua .
Puas yog kev coj ncaj ncees thiab kev ncaj ncees yog tib yam?
Raws li kev nkag siab no, "kev coj ncaj ncees" leans ntawm kev txiav txim siab raws li tus kheej tus cwj pwm, thiab kev nkag siab ntau dua ntawm qhov raug thiab qhov tsis ncaj ncees los ntawm tib neeg - qhov "kev coj ncaj ncees"
