Video: Tus nqi tseem ceeb yog dab tsi?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
A tus nqi tseem ceeb yog siv nyob rau hauv qhov tseem ceeb xeem. Nws yog lub tus nqi hais tias ib qho kev xeem statistic yuav tsum tshaj nyob rau hauv kev txiav txim rau lub null hypothesis yuav raug tsis lees paub. Piv txwv li, lub tus nqi tseem ceeb ntawm t (nrog 12 degrees ntawm kev ywj pheej siv 0.05 qhov tseem ceeb theem) yog 2.18.
Xav txog qhov no, koj ua li cas thiaj nrhiav tau tus nqi tseem ceeb ntawm T?
Rau nrhiav a tus nqi tseem ceeb , saib koj qhov kev ntseeg siab nyob rau hauv kab hauv qab ntawm lub rooj; qhov no qhia koj tias kab ntawv twg t - rooj koj xav tau. Txiav kab ntawv no nrog kab rau koj df (degrees ntawm kev ywj pheej). Tus lej koj pom yog tus tus nqi tseem ceeb (los yog t *- tus nqi ) rau koj qhov kev ntseeg siab lub sijhawm.
Kuj Paub, tus nqi tseem ceeb rau 99% yog dab tsi? Txheeb cais rau Dummies, 2nd Edition
| Kev ntseeg siab | z* - tus nqi |
|---|---|
| 90% | 1.64 |
| 95% | 1.96 |
| 98% | 2.33 |
| 99% | 2.58 |
Yog li ntawd, T Critical txhais li cas?
Cov t - tseem ceeb tus nqi yog qhov txiav tawm ntawm kev tuav lossis tsis lees txais qhov kev xav tsis tseeb. Thaum twg lub t -statistic yog deb ntawm 0 tshaj qhov t - tseem ceeb tus nqi, lub null hypothesis raug tsis lees paub; txwv tsis pub, lub null hypothesis yog khaws cia.
Tus nqi tseem ceeb ntawm T yog dab tsi thiab nws qhia koj li cas?
Qhov zoo tus nqi tseem ceeb yog 2,262;. yog li ntawd, qhov tsis zoo tus nqi tseem ceeb yog -2.262. Criticalvalue muab los ntawm t - Kev faib tawm: ob - qab xeem. Qhov ntxoov ntxoo hauv cheeb tsam ob tug sawv cev rau cheeb tsam tsis lees paub; Yog hais tias qhov kev xeem statisticfalls nyob rau hauv ob tug Tsov tus tw, lub null hypothesis yuav raug tsis lees paub.
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