Question: Let I1 be an interaction variable created from a binary variable D and a continuous variable X. Suppose we have a regression model containing D,

Let I1 be an interaction variable created from a binary variable D and a continuous variable X. Suppose we have a regression model containing D, X and I1 on the right hand side. Group of answer choices The coefficient on X is the effect of a 1 unit change of X on Y, holding D constant. The coefficient on D is the effect of a change of D on Y, when . The coefficient on I1 is the effect of a 1 unit change of X on Y when . The sum of the coefficients on X and I1 is the effect of a 1 unit change of X on Y when

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