15. Refer to Table 9.1. Let violent crime rate. Fit the model to the 51 observations with percentage in poverty and percentage of single-parent families as predictors.

a) Report the prediction equation.

b) Construct a stem and leaf plot or a histogram of the residuals. Interpret.

c) Plot the residuals against the predicted values. Interpret.

d) Plot the residuals against percentage of single-parent families Interpret

e) Refit the model without the D.C. observation. and discuss the changes in the model fit and residual patterns