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Question 7 (4 points) Le comptable de l'entreprise Samson et fille a obtenu l'information ci-contre sur le cout de la main d'oeuvre (y) associe a

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Question 7 (4 points) Le comptable de l'entreprise Samson et fille a obtenu l'information ci-contre sur le cout de la main d'oeuvre (y) associe a la fabrication de 13 lots de diverses tailles (x) pour une piece particuliere. L'equipement utilise par les employes est assez complexe et necessite souvent des ajustements, avant et durant la production, affectant ainsi les couts de production. On veut utiliser la regression lineaire comme outil statistique pour prevoir les couts de la main d'oeuvre selon la taille des lots. Les calculs preliminares conduisent aux resultats suivants : Ey, = 11845 Ex,y; = 472563 Ev,2 = 10879427 Ex? = 20897 On obtient egalement que b1 = 8,5886 s(b1) = 1,74 Var(x) = 67,5641 SCT = 86809,6923 F = 24,3619 Var(y) = 7234,1410 Calculer la limite inferieure d'un intervalle de confiance de 90% sur b 1

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