In a multiple regression, the following sample regression equation is obtained:

Question

In a multiple regression, the following sample regression equation is obtained: y-hat= 141 + 12.8 x_1 + 2.7 x_2. Predict y if x_1 equals 22 and x_2 equals 40. (Round your answer to 1 decimal place.) y-hat_______Interpret the slope coefficient of x_1. As x_1 increases by one unit, y is predicted to increase by 2.7 units, holding x_2 constant. As x_1 increases by one unit, y is predicted to decrease by 12.8 units, holding x_2 constant. As x_1 increases by one unit, y is predicted to decrease by 2.7 units, holding x_2 constant. As x_1 increases by one unit, y is predicted to increase by 12.8 units, holding x_2 constant.

Explanation / Answer

a)

using the formula we have

Y = 141 + 12.8 * 22 + 2.7 * 40

Y = 530.6

b)

as x1 increase by one unit , y is predicted to increase by 12.8 units , holding x2 constant

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