Question: Obtain a regression model for data of Exercise 2.4 using the reference cell coding method for dummy variables. Analyze the data, fitting the model and


Obtain a regression model for data of Exercise 2.4 using the reference cell coding method for dummy variables. Analyze the data, fitting the model and testing for significance of the fitted parameters. Extract residuals for this fit and test for the assumption of normality of the errors. Use L5 as the reference cell.

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