Description
- Revisiting the teengamb dataset (data(teengamb)). Consider a linear regression model of Ylog = log(teengamb$gamble + 1) on sex, status, income and verbal. Using the codes from the classnotes to produce partial regression and partial residual plots for the predictor verbal. Is it appropriate to claim that Y has a linear relationship with verbaladjusted for the existence of other predictors in the model?
- For the teengamb problem, use the Yorg and Ylog and the corresponding regression models to answer the following questions.
- Check for and report large leverage points.
- Would the leverage values differ for Yorg and Ylog models, explain.
- For the teengamb problem, use the Ylog and the corresponding regression model to answer the following questions.
- Check for and report outliers.
- Check for influential points. Please briefly comment on the relationship of the Cook’s distances to residuals and leverage levels for the two data points with the largest Cook’s distances.
