A fitted multiple regression equation is Y = 28 + 5X1 - 4X2 + 7X3 + 2X4.When X1 increases 2 units and X2 increases 2 units as well,while X3 and X4 remain unchanged,what change would you expect in your estimate of Y?
A)Increase by 2
B)Decrease by 4
C)Increase by 4
D)No change in Y

Question

Quizplus · Accepted Answer

The change in Y is calculated by substituting the changes in X1 and X2 into the equation: (5*2) - (4*2) = 10 - 8 = 2. Thus, Y increases by 2.

A Fitted Multiple Regression Equation Is Y = 28