7 Refer to Problem 11.5. With X3 = percentage of single-parent families also in the model. Table 11.12 shows results.

a) Report the prediction equation and interpret the coefficients

b) Report R, and interpret

c) Report the test statistic for Ho P ==B3 = 0. find its df values and P-value, and interpret.

d) Find the statistic for H B = 0 and its df and P-value for H: B = 0, and interpret.

e) Construct a 95% confidence interval for B), and interpret.

f) Without X3 in the model. the coefficient of X, is 32.62 Why do you think it changes so much after X3 is added? g) Since Table 9 I provides data for all states, what relevance, if any, do the inferences have in this exercise and Problem 11.5?