Using the Carseats dataset:

Questions

• Apply the Best Subset Selection approach with the Carseats dataset, with Sales as the response and all other variables as predictors. Store the output of the regsubsets() function in regfit.full. Set the nvmax option to 5.
• Using the which.max() function, determine the optimal amount of predictors based on the \(\bar R^2\) and store the result in n.predictors.
• MC1:
  A) Based on the \(\bar R^2\), the optimal model contains the Age variable
  B) Based on the \(\bar R^2\), the optimal model contains the Education variable
  • 1) Both statements are true.
  • 2) Both statements are false.
  • 3) A is true and B is false.
  • 4) A is false and B is true.

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Assume that:

• The ISLR2 and leaps libraries have been loaded
• The Carseats dataset has been loaded and attached