What is the MAPE for this model?

Here are 10 questions, I already finished, but there has problems, I fix 1-8, need you help me fix 9 and 10.Develop a regression model to predict the index popularity

  1. Use the training set to build a model with all variables including dummies indicating the type of food
  2. What is the MAPE for this model?
  3. Do the signs of the coefficients are the same as the sign of the correlations with popularity index?
  4. Can you drop any variable to improve the model?
  5. Has the MAPE improve after dropping that variable?
  6. Are all coefficients significant on this model?
  7. Try to improve the model by dropping variables or combining variables
  8. Plot the fitted versus the residuals for the training and for the testing set. Can you observed strange predicted values or outliers?
  9. Try to include the outlier in the testing set or remove it.
  10. What is the model? and what does it mean?

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