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Video: Z xeem siv rau dab tsi?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
A z.; ib - xeem yog kev txheeb cais xeem los txiav txim siab seb ob qho tib neeg txhais li cas sib txawv thaum paub qhov sib txawv thiab cov qauv me me loj. Nws tuaj yeem yog siv rau xeem hypotheses uas z.; ib - xeem ua raws li kev faib khoom ib txwm muaj.
Raws li, vim li cas peb thiaj siv Z xeem?
A z.; ib - xeem sib piv cov piv txwv rau cov neeg tau teev tseg thiab feem ntau yog siv rau kev daws teeb meem ntsig txog cov qauv loj (n> 30). Z - kev xeem kuj tuaj yeem pab tau thaum peb xav tau xeem ib hypothesis. Feem ntau, lawv muaj txiaj ntsig tshaj plaws thaum paub qhov txawv ntawm tus qauv.
vim li cas Z xeem muaj zog dua li t xeem? Homogeneity ntawm Variance- Qhov sib txawv ntawm cov piv txwv yog kwv yees tib yam li qhov kev hloov pauv ntawm cov pej xeem. (A z.; ib - xeem siv cov txheej txheem pej xeem yuam kev qhov twg t - xeem siv kwv yees tus qauv yuam kev. Yog li, cov z.; ib - xeem yog ntau dua muaj tseeb thiab haib tshaj .)
Zoo sib xws, Z xeem nrog piv txwv yog dab tsi?
Z - Xeem nrog Piv Txwv . Txhais Z xeem yog txheej txheem kev txheeb cais uas siv rau xeem lwm txoj kev xav los tawm tsam qhov kev xav tsis raug. Z - xeem yog ib qho kev kwv yees kwv yees uas siv los txiav txim siab seb ob qho piv txwv 'txhais tau li cas txawv thaum paub qhov sib txawv thiab qauv yog loj (n ≧ 30).
Qhov sib txawv ntawm T qhab nia thiab Z qhab nia yog dab tsi?
Qhov sib txawv ntawm Z qhab nia vs ua T tau . Z tau qhab nia yog qhov rho tawm ntawm cov pej xeem txhais los ntawm raw qhab nia thiab tom qab ntawd faib cov txiaj ntsig nrog cov pej xeem cov qauv sib txawv. T tau yog kev hloov pauv ntawm cov ntaub ntawv nyoos rau tus qauv qhab nia thaum hloov dua siab tshiab yog ua raws cov qauv piv txwv thiab piv txwv tus qauv sib txawv.
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