Question 16 6.25 The following regression model has been proposed to predict sales at a fast food outlet.
Y=18-2x_(1)+7x_(2)+15x_(3)
Where 1, " rumber of competitors
x_(2)
* population within one mile
x_(3)=1
if a drive-up window otherwise 0
Y=
sales in (1000s) What is the interpretation of 15 (the coefficient of XX3) in the regression equation? Sales of stores with drive-up windows are
$15,000
lower than those without drive-up windows Sales of stores with drive-up windows are
$15.000
higher than those without drive-up wind-un Sales of stores with drive-up windows are never higher than those without drive-up windows none of the stated answers is correct