
Variable  Description 

MEDV  Median values of owneroccupied housing in thousands of USD 
LON  Tract point longitude in decimal degrees 
LAT  Tract point latitude in decimal degrees 
CRIM  Per capita crime 
ZN  Proportion of residential land zoned for lots over 25,000 sq. ft per town 
INDUS  Proportion of nonretail business acres per town 
CHAS  An indicator: 1 if tract borders Charles River; 0 otherwise 
NOX  Nitric oxides concentration (parts per 10 million) per town 
RM  Average number of rooms per dwelling 
AGE  Proportions of owneroccupied units built prior to 1940 
DIS  Weighted distance to five Boston employment centres 
RAD  Index of accessibility to radial highways per town 
TAX  Propertytax rate per USD 10,000 per town 
PTRATIO  Pupilteacher ratio per town 
B  Calculated as 1000*(Bk−0.63)^{2} where Bk is the proportion of blacks 
LSTAT  Percentage of lower status population 
