6.11 Suppose that the results shown in Figure 6.8 were obtained for the study described in Problem 6.8, using only x4

= years of schooling as a predictor:

a. What are the estimated values of the intercept (α) and slope (β) for this GLM?

b. What is the likelihood ratio test statistic for the fit of this model?

c. What is the Wald test statistic for the fit of this model, based on Equation 6.3?

d. How was the (squared) Wald statistic shown in this output (“Wald Chi-Square”)

obtained?

e. What conclusions can be drawn from the result of the likelihood ratio test for the slope (part b)?

f. What conclusions can be drawn from the result of the Wald test for the slope (parts c and d)?