Question: Question 2: Consider the following data set

a. Obtain the scatterplot and comment on the plot.

b. Define the necessary dummy variables and write down the interaction linear regression model for this problem.

c. Obtain the best fitted model.

d. Test if interaction is significant or not (use 5% significance level for the test).

e. Regardless of your result in part (d), at 1% level of significance, is sex an important variable? How about age?