## The Boston Housing DatasetA Dataset
derived from information collected by the U.S. Census Service concerning housing
in the area of Boston Mass. |

This dataset contains information collected by the U.S Census Service
concerning housing in the area of Boston Mass. It was obtained from the StatLib
archive (http://lib.stat.cmu.edu/datasets/boston),
and has been used extensively throughout the literature to benchmark algorithms.
However, these comparisons were primarily done outside of **Delve** and are
thus somewhat suspect. The dataset is small in size with only 506 cases.

The data was originally published by Harrison, D. and Rubinfeld, D.L. `Hedonic prices and the demand for clean air', J. Environ. Economics & Management, vol.5, 81-102, 1978.

The name for this dataset is simply **boston**. It has two prototasks:
**nox**, in which the nitrous oxide level is to be predicted; and **price**,
in which the median value of a home is to be predicted

**Origin**- The origin of the boston housing data is
**Natural**. **Usage**- This dataset may be used for
**Assessment**. **Number of Cases**- The dataset contains a total of
**506**cases. **Order**- The order of the cases is
**mysterious**. **Variables**- There are
**14**attributes in each case of the dataset. They are:- 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
- MEDV - Median value of owner-occupied homes in $1000's

**Note**- Variable #14 seems to be censored at 50.00 (corresponding to a median price of $50,000); Censoring is suggested by the fact that the highest median price of exactly $50,000 is reported in 16 cases, while 15 cases have prices between $40,000 and $50,000, with prices rounded to the nearest hundred. Harrison and Rubinfeld do not mention any censoring.

Last Updated 10 October 1996 Comments and questions to: delve@cs.toronto.edu |