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L'diteur d'un journal interroge un chantillon de 200 tudiants sur la qualit des articles publis; 140 d'entre eux se disent insatisfaits. Avec un niveau de

  1. L'diteur d'un journal interroge un chantillon de 200 tudiants sur la qualit des articles publis; 140 d'entre eux se disent insatisfaits. Avec un niveau de certitude de 0,99, quelle est la proportion de la population tudiante qui est insatisfaite des articles?

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