1. Describe the overall explanatory power of this regression model, as well as the relative importance of each continuous variable. (attached)
2. Based on the importance of the binary or dummy variable that indicates superstore competition, do superstores pose a serious threat to Columbia's profitability?
3. What factors might Columbia consider in developing an effective competitive strategy to combat the superstore influence?
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The solution gives the step by step procedure for the regression analysis of profit margins for Columbia data.