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L'implication statistique, selon R.Gras, permet d'associer à un ensemble de variables binaires ou fréquentielles un préordre représentable par un graphe non symétrique et par une hiérarchie ascendante. L'analyse d'un questionnaire à modalités totalement ordonnées nous contraint, pour conserver l'information maximale, à étendre cette notion à des variables modales et, par suite et a fortiori, à des variables ordinales qui s'y ramènent. A la suite de cette construction, on examine les contributions...
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