Multiple choice questions based on multiple regression.
1. A multiple regression model has the form = 5 + 6X + 7W. As X increases by 1 unit (holding W constant), Y is expected to
1. increase by 11 units
2. decrease by 11 units
3. increase by 6 units
4. decrease by 6 units
2. In a regression model involving 44 observations, the following estimated regression equation was obtained. = 29 + 18X1 + 43X2 + 87X3. For this model SSR = 600 and SSE = 400. The coefficient of determination for the above model is
1. 0.667
2. 0.600
3. 0.336
4. 0.400