Cov txheej txheem:
Video: Yuav ua li cas koj siv lub ntsiab lus tseem ceeb t nqi?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Rau nrhiav ib 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 lub sijhawm tso siab.
Tsis tas li ntawd, tus nqi tseem ceeb T yog dab tsi?
A tus nqi tseem ceeb yog siv rau hauv kev ntsuam xyuas qhov tseem ceeb. Nws yog tus 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.
Tus nqi tseem ceeb ntawm T yog dab tsi rau lub sijhawm 95 kev ntseeg siab? Table of Critical t-Values rau 95% Kev Ntseeg Siab
| ν = n - 1 | tcrit |
|---|---|
| 7 | 2.365 |
| 8 | 2.306 |
| 9 | 2.262 |
| 10 | 2.228 |
Cov neeg kuj nug, koj yuav nrhiav tau qhov tseem ceeb npaum li cas?
Txhawm rau nrhiav tus nqi tseem ceeb, ua raws li cov kauj ruam no
- Compute alpha (α): α = 1 - (qib kev ntseeg siab / 100)
- Nrhiav qhov tseem ceeb tshaj plaws (p*): p* = 1 - α/2.
- Txhawm rau nthuav qhia tus nqi tseem ceeb raws li tus qhab nia z, nrhiav tus z-tus qhab nia uas muaj qhov tshwm sim sib npaug sib npaug rau qhov tseem ceeb (p *).
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 los xij 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.
Pom zoo:
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