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Les rsultats un test d'aptitude en informatique pour un chantillon de 12 individus sont les suivants: 78 / 60 / 64 / 82 / 80

Les rsultats un test d'aptitude en informatique pour un chantillon de 12 individus sont les suivants: 78 / 60 / 64 / 82 / 80 / 66 / 74 / 61 / 68 / 57 / 61 / 85. Estimer la limite suprieure pour un intervalle de confiance sur une variance. Utiliser un seuil de signification de 10%. La variance de cet chantillon est gale 94,0606.

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