Refer to the CDI data set in Appendix C.2.
a. For each geographic region, regress the number of serious crimesin a CDI (Y) against
population density (X" total population divided by land area), percapita personal income
(X2 ), and percent high school graduates (X3 ). Use first-orderregression model (6.5) with
three predictor variables. State the estimated regressionfunctions.
b. Are the estimated regression functions similar for the fourregions? Discuss.
c. Calculate MSE and R2 for each region. Are these measures similarfor the four regions?
Discuss.
d. Obtain the residuals for each fitted model and prepare a boxplot of the residuals for each
fitted modeL Interpret your plots and state your findings.
I Can do it by my self but Can you explain how what is meaning (b),(c) and (d)
Just write explantions
