For recent General Social Survey data, a prediction equation relating Y =

whether attended college (1 = yes) to x = family income (thousands of dollars,

using scores for grouped categories), m = whether mother attended

college (1 = yes, 0 = no), f = whether father attended college (1 = yes,

0 = no), was logit[ P(Y = 1)] = 1.90 + 0.02x + 0.82m + 1.33f . To summarize

the cumulative effect of the predictors, report the range of values

between their lowest levels (x = 0.5, m = 0, f = 0) and their highest levels

(x = 130, m = 1, f = 1).