For Table 3.6 on the 50 states and D.C., the figure below shows the relationship between the murder rate and the percentage of single-parent families.
a. For D.C., the percentage of single-parent families = 44.7 and the murder rate = 41.8. Identify D.C. on the scatter plot, and explain the effect you would expect it to have on a regression analysis.
b. The regression line fitted to all 51 observations is ŷ = -21.4 + 1.14x. The regression line fitted only to the 50 states is ŷ = -8.2 + 0.56x. Summarize the effect of including D.C. in the analysis.