Mammographic Mass data set

1: Description.

This data set can be used to predict the severity (benign or malignant) of a mammographic mass lesion from BI-RADS attributes and the patient's age.
It contains a BI-RADS assessment, the patient's age and three BI-RADS attributes together with the ground truth (the severity field, which is the target attribute). 

The data was collected at the Institute of Radiology of the University Erlangen-Nuremberg between 2003 and 2006.

2: Type.			Classification	
3: Origin.			Real world
4: Instances.		830 (961)
5: Features.		5
6: Classes.			2	
7: Missing values.	Si

8: Header.

@relation mammographic
@attribute BI-RADS integer [0,6]
@attribute Age integer [18,96]
@attribute Shape integer [1,4]
@attribute Margin integer [1,5]
@attribute Density integer [1,4]
@attribute Severity {0, 1}
@inputs BI-RADS, Age, Shape, Margin, Density
@outputs Severity