Income  Education
     20.5    12
     31.5    16
     47.7    18
     26.2    16
     44.0    12
     8.28    12
     30.8    16
     17.2    12
     19.9    10
     9.96    12
     55.8    16
     25.2    20
     29.0    12
     85.5    16
     15.1    10
     28.5    18
     21.4    16
     17.7    20
     6.42    12
     84.9    16
/*
Hypothetical Data of Income (in thousands) and Education (in years)
Source: Greene [1997], Chapter 4, Table 4.1
*/