13.63 Violent crime A MINITAB printout is provided from fitting the multiple regression model to U.S. crime data for the 50 states (excluding Washington, D.C.)

on y = violent crime rate, x1 = poverty rate, and x2 = percent living in urban areas.

a. Predict the violent crime rate for Massachusetts, which has violent crime rate = 476, poverty rate = 10.2%, and urbanization = 92.1%. Find the residual and interpret.

b. Interpret the effects of the predictors by showing the prediction equation relating y and x1 for states with

(i) x2 = 0 and (ii) x2 = 100. Interpret.

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Regression of violent crime rate on poverty rate and urbanization Term Coef SE Coef T-Value P-Value Constant -270.7 121.1 -2.23 0.030 poverty 28.334 7.249 3.91 0.000 urbanization 5.416 1.035 5.23 0.000