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Lorsqu'une variable est 'significative à 10%', lesquelles des affirmations suivantes sont correctes? (i) L'hypothèse nulle selon laquelle la valeur vraie du coefficient de cette variable est égale à zéro, est rejetée à un seuil de confiance de 10%. (ii) Le t-ratio test indique que le t* (calculé en valeur absolue) est plus grand que la valeur critique (c.à.d. le 95ème percentile) provenant de la distribution t de Student. (iii) La valeur absolue du coefficient estimé de cette variable est nécessairement élevée. (iv) Le coefficient estimé de cette variable affiche un écart-type nécessairement petit.

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