The following regression model has been proposed to predictsales at a computer store.
                          Y=60-2X1+30X2+10X3
                          Where
                          X1= competitor’s previous day’s sales(in $1,000s)
                          X2=population within 1 mile (in1,000s)
                          X3=1 if radio advertising was used; 0 if otherwise
- What is the estimated regression equation if no radioadvertising was used?
- What is the estimated regression equation if radio advertisingwas used?
- What is the expected amount of sales attributable to radioadvertising?
                          Y= Sales (in $1,000s)
