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