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3. Considerons 3 populations normales avec une variance commune o' = 100. (a) Determiner la taille des groupes n requise pour un plan equilibre (n

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3. Considerons 3 populations normales avec une variance commune o' = 100. (a) Determiner la taille des groupes n requise pour un plan equilibre (n = ng = ny = n), afin que la puissance du test de l'egalite des moyennes soit 80% pour identifier une etendue de les moyennes de A = 20 a un niveau de signification de a = 5%

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