Calculateur du Test Exact de Fisher Gratuit
Effectuez le test exact de Fisher sur un tableau de contingence 2x2. Testez l'association entre deux variables catégorielles.
Odds Ratio
9.3333
Total N20
Row 1 Total10
Row 2 Total10
Odds Ratio vs Cell a (R1,C1)
Formule
Fisher Exact Test
Computes exact probability for 2x2 tables. Preferred over chi-square for small samples.
Exemple Résolu
2x2: a=8, b=2, c=3, d=7.
- 01OR = 56/6 = 9.33
- 02N=20
Questions Fréquentes
When vs chi-square?
When any expected count < 5 or N < 20.
Odds ratio?
OR > 1 means event more likely in group 1.
Beyond 2x2?
Use Freeman-Halton extension.
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