Circulation: Use Regression Analysis to Optimize Catalog Circ and Sales Data

We want to know if sales increases on the East Coast match increases on the West Coast. Before we can justify spending time and money to discover if differences are due to things such as demographics or customers’ personal income distribution, we first must discern if there’s a statistical difference in sales increases. Gather the data from the coupons returned from the two localities and chart them with their corresponding sales increases. The more data points gathered, the better regression analysis works. Use the graphing capabilities of your spreadsheet software to create XY scatter diagrams to give a better visual illustration.