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Subject Code : ECO319
Country : United States
Assignment Task 
ECO319 - R or SAS - Introduction to Econometrics - Economics Assignment Help

Use R or SAS and the nutrition data set to perform the following analysis: 
 
(a) Build a multiple regression model for the purposes of predicting calories, using all the other variables as the predictors.  
(b) Which of the predictors probably does not belong in the model? Explain how you know this. What might be your next step after viewing these results? 
(c) Suppose we omit cholesterol from the model and rerun the regression. Explain what will happen to the value of R2. 
(d) Which predictor is negatively associated with the response? Explain how you know this. 
(e) Build a multiple regression model for the purposes of predicting calories, using the forward selection method. 
(f) Build a multiple regression model for the purposes of predicting calories, using the backward elimination method. 
(g) Build a multiple regression model for the purposes of predicting calories, using the stepwise variable selection procedure.  
(h) Apply the best subsets procedure, and compare it against the previous methods. 
(i) Perform all possible regressions. Did the variable selection algorithms find the best regression?

 

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  • Posted on : November 28th, 2018

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