What is the SAS code?

9. a. Remove any observations that you deem are outliers or influential observations and refit the model with the interaction. Justify your rationale for choosing the observations to remove.

b. Re-create the scatterplot matrix from question 4.

c. Write a few sentences in which you interpret the model and compare with the previous results.

Include any observations on changes (or lack thereof) in the scatterplot matrix.