In a regression analysis involving 30 observations the follo

In a regression analysis involving 30 observations, the following estimated regression equation was obtained. y = 17.6 + 3.8x_1 - 2.3x_2 + 7.6x_3 + 2.7x_4 What is the n? What is the K? The estimated value of Y when X_1 = X_2 = X_3 = X_4 = 10 is:

Solution

A). number of observations , n=30

B). independent variables , k=4

C).

Y = 17.6+3.8x1-2.3x2+7.6x3+2.7x4

When x1=x2=x3=x4=10.3,

Y = 17.6+3.8*10.3 - 2.3*10.3+7.6*10.3+2.7*10.3

=139.14