QUESTION 1 1 points Save Answer Suppose we have estimated Y=10 + 20XX 1 + 30XX 2 . Assume each estimated coefcient is statistically significant at the 1% level. How should we interpret the coefcient on X 1? A A unit increase in X 1 results in the actual value on increasing by 20 units. A A unit increase in X 1 results in the predicted value of Y increasing by 30 units. A, A unit increase in X 1 results in the predicted value of Y increasing by 20 units, holding X 2 constant. A A unit increase in X 1 results in the actual value on increasing by 30 units, holding X 2 constant. A) None of the above. QUESTION 2 1 points Save Answer Consider a population regression model. For simplicity, ignore the subscript i that we normally attach with the variables. If k=2. then the model can be written as: m A Y =BO+B1X1+l52X2 +e m A Y= Bo +B1X1+l32X2 += C\QUESTION 3 1 points Save Answer To estimate a multiple regression model, ordinary least squares methodology minimizes , A the squared sum of errors. T the sum of squared residuals. O the squared sum of residuals. N None of the above