Kuv yuav tsum siv qib alpha li cas?
Kuv yuav tsum siv qib alpha li cas?

Video: Kuv yuav tsum siv qib alpha li cas?

Video: Kuv yuav tsum siv qib alpha li cas?
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Anonim

Qhov tseem ceeb qib α yog qhov tshwm sim ntawm kev txiav txim siab tsis ncaj ncees thaum qhov kev xav tsis tseeb yog qhov tseeb. Alpha qib (qee zaus tsuas yog hu ua qhov tseem ceeb qib ”) yog siv rau hauv kev ntsuam xyuas kev xav. Feem ntau, cov kev xeem no yog khiav nrog ib qib alpha ntawm 05 (5%), tab sis lwm yam qib nquag siv yog. 01i ib.

Ib yam li ntawd, kuv yuav tsum siv tus nqi alpha li cas?

Txawm hais tias nyob rau hauv txoj kev xav muaj tus lej ntawm 0 thiab 1 ua tau siv rau alpha , thaum nws los txog rau statistical xyaum qhov no tsis yog li ntawd. Ntawm txhua theem ntawm qhov tseem ceeb, lub tus nqi ntawm 0.10, 0.05 thiab 0.01 yog cov feem ntau siv rau alpha.

Kuj Paub, Alpha yog dab tsi hauv stats? Alpha . Hais txog cov teeb meem kwv yees, alpha hais txog qhov tshwm sim uas qhov tseeb ntawm cov pej xeem tsis nyob sab nraum lub sijhawm kev ntseeg siab. Alpha feem ntau yog qhia raws li kev faib ua feem. Yog li, yog tias qib kev ntseeg siab yog 95%, ces alpha yuav sib npaug 1 - 0.95 los yog 0.05.

Kuv yuav tsum siv qhov tseem ceeb npaum li cas?

Qib tseem ceeb . Cov qib tseem ceeb rau ib tug muab hypothesis xeem yog tus nqi uas P-tus nqi tsawg dua lossis sib npaug yog suav tias yog qhov tseem ceeb. Cov txiaj ntsig zoo rau yog 0.1, 0.05, thiab 0.01. Cov txiaj ntsig no sib raug rau qhov tshwm sim ntawm kev soj ntsuam xws li tus nqi siab dhau los ntawm lub sijhawm.

Puas yog P tus nqi thiab alpha tib yam?

Alpha , theem tseem ceeb, yog qhov tshwm sim uas koj yuav ua qhov yuam kev ntawm kev tsis lees paub qhov kev xav tsis tseeb thaum qhov tseeb nws muaj tseeb. Cov p - tus nqi ntsuas qhov tshwm sim ntawm qhov ua tau zoo tshaj plaws tus nqi tshaj qhov koj tau txais los ntawm kev sim. Yog tias p - tus nqi yog loj dua alpha , koj lees txais qhov null hypothesis.

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