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ecart reduit


MaHa_logène
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saluut!!!

j'ai une question par rapport a l'écart réduit

alors je sais que pour avoir un test de student il faut que n1 ou n2<30 et pour avoir u chi2 il faut que les effectifs attendu soit>5 (je pense)

mais du coup pour l'ecart reduit c'est quoi les conditions?  

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