(5 points) 1c. Is there evidence to conclude that an increase in the own price leads to a decrease in sales in the experimental group? Set up the appropriate hypotheses and conduct the test. Use 95% confidence. (5 points) 1d. Is there evidence to conclude that the model for the experimental group is significant as a whole? Set up the appropriate hypotheses and conduct the test. Use 95% confidence. Part 2 (10 points) 2a. Run a regression of SalesExp against BPriceExp, CPriceExp and DUM. Provide the estimated regression equation. (10 points) 2b. What does DUM measure? What can you conclude about the advertising experiment based on these results? Part 3 (10 points) 3a. Run a regression of SalesCatl against BPriceCutl, CPriceCntl and DUM. Provide the estimated regression equation