Let's consider a toy example of a health data as shown in following table. pid age sex cp bps 254932 63 1 ? 130 964562 ? 4 ? 563291 55 .V 4 142 892741 60 1 W 139 The data include 5 attributes as: pid: patient ID age: age in years sex: sex (1 = male; 0 = female) cp: chest pain type -- Value 1: typical angina -- Value 2: atypical angina -- Value 3: non-anginal pain -- Value 4: asymptomatic . bps: blood pressure (in mm Hg)