index: 序號

 

crim: 每個城鎮的人均犯罪率 per capita crime rate by town

 

zn  : proportion of residential land zoned for lots over 25,000 sq.ft.

 

indus : 每個城鎮非零售業的營業面積比例 proportion of non-retail business acres per town

 

chas : 是否靠近河邊 Charles River dummy variable (= 1 if tract bounds river; 0 otherwise)

 

nox : 一氧化氮濃度 nitric oxides concentration (parts per 10 million)

 

rm : 每個住宅的平均房間數 average number of rooms per dwelling

 

age : 1940年前私有住宅的住房比率 proportion of owner-occupied units built prior to 1940

 

dis : 與五個波士頓工作地區的加權距離 weighted distances to five Boston employment centres

 

rad : 徑向公路的通達指數 index of accessibility to radial highways

 

tax : 每1萬美元的所需繳的財產稅 full-value property-tax rate per $10,000

 

ptratio : 每個城鎮的師生比例 pupil-teacher ratio by town

 

black : 黑人比例 1000(Bk - 0.63)^2 where Bk is the proportion of blacks by town

 

lstat : 中下階級的比率 % lower status of the population

 

medv： 以1000 美元為單位的自住房屋的中值 Median value of owner-occupied homes in $1000's