Question: 2. Build a statistical model that explain the relationship between sales and promotional effort and interpret the regression output start will all the explanatory variables

2. Build a statistical model that explain the relationship between sales

2. Build a statistical model that explain the relationship between sales and promotional effort and interpret the regression output start will all the explanatory variables and analyze the output - can we improve the model? For the best mode you choose please assess: the quality of the model, ii. interpret the estimated coefficients ili. the statistical significance of the proposed explanatory variables

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