13.5. Based on a national survey, Table 13.16 shows results of a prediction equation for y = alcohol consumption, measured as the number of alcoholic drinks the subject drank during the past month.

(a) For x = alcohol consumption three years ago and dummy variables f for whether father died in the past three years, s for sex, and (m1,m2,m3) for the four categories of marital status, report the prediction equation.

(b) Find the predicted alcohol consumption for a divorced male whose father died in the previous three years and whose consumption three years previously was (i) 0 drinks per month, (ii) 10 drinks per month.

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TABLE 13.16 Explanatory Variable Estimate Std. Error Intercept 8.3 Death of father in past three years (0 = no) 9.8 2.9 Sex (0=male) -5.3 1.6 Marital status (0 married) Divorced, separated 7.0 2.0 Widowed 2.0 3.6 Never married 1.2 2.4 Alcohol consumption three years ago 0.501 0.023