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            <video:description>Aujourd&#39;hui, les outils technologiques permettent de calculer facilement un coefficient de corrélation (r). Mais faisons l&#39;exercice d&#39;utiliser la formule, pour comprendre comment r décrit le degré d&#39;alignement des points dans un nuage de points. Sa valeur nous renseigne sur le type de corrélation entre deux variables, et sur la validité de cette corrélation linéaire.</video:description>
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            <video:duration>742</video:duration>
            <video:category>Ajustement linéaire</video:category>
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