Flashcards
BA1A.10 - HC.3 Significantie en relevantie van resultaten
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relevantie versus significantie
relevantie versus significantie
hoe groter de steekproef hoe smaller het BI en hoe kleiner de p-waarde.
Dus met een voldoende grote steekproef is ook een klein verschil significant te krijgen (want SEM= SD/wortel n).
Maar is het gevonden verschil dan wel relevant?
Fouten bij toetsen (3)
Fouten bij toetsen (3)
- Resultaat is niet valide
- Verkeerde analyse/toetsingstechniek gebruikt
- Onzekerheid bij toetsen
type I fout
type I fout
de kans is (bij p < 0.05) is 5%.
Men verwerpt de H0 als de steekproefuitkomst een te extreme waarde heeft in de verdeling onder de H0.
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