Tus Tsov tus tw yog hais txog qhov kawg ntawm qhov kev faib tawm ntawm cov lej xeem rau qhov kev tshuaj xyuas tshwj xeeb uas koj tab tom ua. … Qhov no txhais tau hais tias kev soj ntsuam xws li ANOVA thiab chi-square xeem tsis muaj a"ib-tailed vs. ob-tailed" kev xaiv, vim tias qhov kev faib tawm lawv yog raws li tsuas muaj ib tus Tsov tus tw.
Yuav ua li cas koj thiaj paub yog qhov kev xeem yog ib tug tailed los yog ob tailed?
Ib qho kev xeem ib leeg muaj tag nrho 5% ntawm qib alpha hauv ib tus Tsov tus tw (hauv sab laug, lossis sab xis). A ob-tailed xeem cais koj qib alpha hauv ib nrab (raws li hauv daim duab rau sab laug).
Puas F-test ib txwm ob tailed?
Los xaus: Thaum muab ob pawg, an F-test yeej ib txwm ib leeg, tab sis koj tuaj yeem tshaj tawm (muaj zog dua) ib sab t-test - raws li ntev npaum li koj txiav txim siab qhov no ua ntej saib cov ntaub ntawv.
Puas F-test ib txwm muaj ib tus tailed?
Ib qho F-test (Snedecor thiab Cochran, 1983) yog siv los ntsuas yog qhov sib txawv ntawm ob tus neeg sib npaug. Qhov kev sim no tuaj yeem yog qhov kev sim ob-tailed lossis ib-tailed test. … Qhov ntau qhov piv txwv no sib txawv ntawm 1, cov pov thawj muaj zog dua rau cov pej xeem tsis sib xws.
Kev xeem twg yog ob qhov kev xeem?
Qhov Kev Xeem Ob-Tailed yog dab tsi? Ib qho kev xeem ob-tailed, hauv kev txheeb cais, yog ib txoj hauv kev uas thaj chaw tseem ceeb ntawm kev faib khoom yog ob sab thiab kuaj seb tus qauv puas ntau dua lossis tsawg dua li qee qhov ntawm qhov tseem ceeb Nws yog siv rau hauv kev sim null-hypothesis thiab kev sim rau kev txheeb xyuas qhov tseem ceeb.
