Question: Compute an imprisonment rate per 1000 population for 2000. Introduce this incarceration rate as an independent variable into the model run in Part B.

? Test the hypothesis that the R squared =0.

? Does this model fit the data better than the model in Part B above? Explain.

? Does each of the independent variables have a statistically significant effect on homicide? Explain.

? How strong is the effect of each of the independent variables? Explain.

? Which of the independent variables has the stronger effect on the homicide rate? Explain.