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Si la valeur du R2 est égale à zéro, lesquelles des affirmations suivantes sont correctes? (i) Tous les coefficients, à l'exclusion de la constante, sont nuls. (ii) La ligne d'ajustement est horizontale par rapport à chacune des variables explicatives. (iii) Le modèle de régression n'explique rien de la variabilité totale de la variable dépendante par rapport à sa moyenne. (iv) Tous les coefficients, dont la constante, sont nuls.

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