Video: Dab tsi yog qhov kev ntseeg siab rau tus nqi tseem ceeb ntawm?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Statistics For Dummies, 2nd Edition
| Kev ntseeg siab | z *– tus nqi |
|---|---|
| 80% | 1.28 |
| 85% | 1.44 |
| 90% | 1.64 |
| 95% | 1.96 |
Ib yam li ntawd, koj ua li cas thiaj nrhiav tau tus nqi tseem ceeb ntawm kev ntseeg siab ib ntus?
Piv txwv lo lus nug: Nrhiav ib tus nqi tseem ceeb rau 90% qib kev ntseeg siab (Ob-Tailed Test). Kauj ruam 1: Tshem tawm qib kev ntseeg siab los ntawm 100% mus rau nrhiav cov α qib 100% - 90% = 10%. Kauj ruam 2: Hloov Kauj Ruam 1 mus rau tus lej: 10% = 0.10. Kauj Ruam 3: Faib Kauj Ruam 2 los ntawm 2 (qhov no hu ua "α/2").
koj pom 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 *).
Kuj kom paub, dab tsi yog qhov tseem ceeb rau 95 kev ntseeg siab lub sijhawm?
Cov tus nqi tseem ceeb rau a 95 % kev ntseeg siab ib ntus yog 1.96, qhov twg (1-0.95)/2 = 0.025.
Dab tsi yog tus nqi tseem ceeb rau 99 kev ntseeg siab ib ntus?
Statistics For Dummies, 2nd Edition
| Kev ntseeg siab | z*– tus nqi |
|---|---|
| 90% | 1.64 |
| 95% | 1.96 |
| 98% | 2.33 |
| 99% | 2.58 |
Pom zoo:
Dab tsi yog plaub qhov kev txiav txim siab tseem ceeb ntawm kev nqis peev Yuav ua li cas hloov cov paj laum cuam tshuam rau kev nqis peev?
Yuav ua li cas hloov cov paj laum cuam tshuam rau kev nqis peev? Plaub qhov kev txiav txim siab tseem ceeb ntawm kev siv peev nyiaj yog kev cia siab ntawm cov txiaj ntsig yav tom ntej, tus paj laum, se ua lag luam thiab nyiaj ntsuab ntws
Lub npe dab tsi tau muab rau Wall Street kev sib tsoo ntawm 29th Lub Kaum Hli 1929 tseem hu ua kev lag luam poob ntawm xyoo 1929 uas ua rau muaj Kev Nyuaj Siab Loj nyob rau xyoo 1930 Kev Nyuaj Siab Loj yog lub ntiaj teb loj heev
Kev Nyuaj Siab Loj tau pib hauv Tebchaws Meskas tom qab muaj kev poob loj hauv cov nqi khoom lag luam uas pib thaum lub Cuaj Hlis 4, 1929, thiab tau dhau los ua xov xwm thoob ntiaj teb nrog kev lag luam lag luam poob ntawm Lub Kaum Hli 29, 1929, (lub npe hu ua Dub Tuesday). Nyob nruab nrab ntawm 1929 thiab 1932, thoob ntiaj teb cov khoom lag luam thoob ntiaj teb (GDP) poob los ntawm kwv yees li 15%
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