The data in figure 9 can be summarized as follows:

average education ≈ 13.0 years, SD ≈ 3.4 years average income ≈ $18,000, SD ≈ $20,000, r ≈ 0.37

(a) Find the r.m.s. error of the regression line for predicting income from education.

(b) Predict the income of a woman with 16 years of education.

(c) This prediction is likely to be off by $___ or so. If more information is needed, say what it is, and why.

(d) Repeat parts

(b) and (c), for a woman with 8 years of education. pl875