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Si la valeur du R2 est égale à 1, lesquelles des affirmations suivantes sont correctes? (i) Toutes les valeurs observées se trouvent sur la ligne de régression. (ii) Toutes les valeurs résiduelles sont nulles. (iii)Toute la variabilité de la variable dépendante par rapport à sa moyenne est expliquée par le modèle. (iv)La droite d'ajustement est horizontale par rapport à toutes les variables explicatives du modèle.
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