Hi guys, I have been stuck on a question for a number of hours.... the question comes with the following data set on a shops advertising spending, this is the data set:
Sales DirectNewspaperTelevision
15.98 1.05 1.35 1.55
21.59 1.29 2.25 1.97
25.47 0.96 1.79 1.64
16.02 1.51 1.73...