| CRIM |
per capita crime rate by town |
| ZN |
proportion of residential land zoned for lots over 25,000 sq.ft. |
| INDUS |
proportion of non-retail business acres per town |
| CHAS |
Charles River dummy variable (= 1 if tract bounds river; 0 otherwise) |
| NOX |
nitric oxides concentration (parts per 10 million) |
| RM |
average number of rooms per dwelling |
| AGE |
proportion of owner-occupied units built prior to 1940 |
| DIS |
weighted distances to five Boston employment centres |
| RAD |
index of accessibility to radial highways |
| TAX |
full-value property-tax rate per $10,000 |
| PTRATIO |
pupil-teacher ratio by town |
| B |
1000(Bk - 0.63)^2 where Bk is the proportion of blacks by town |
| LSTAT |
% lower status of the population |
| target |
Median value of owner-occupied homes in $1000’s, MEDV originally |