Data Mining: Practical Machine Learning Tools and Techniques, Second Edition

1.2 SIMPLE EXAMPLES: THE WEATHER PROBLEM AND OTHERS 19

wage increase first yearbad

≤ 2.5

statutory holidays

> 2.5

good

> 10

wage increase first year

≤^10

bad

≤^4

> 4 good

(a)

≤ 2.5

statutory holidays

> 2.5

bad

≤^36 health plan contribution

> 36

good

> 10

wage increase

first year

wage increase

first year

working hours

per week

≤^10

bad

none

good

half

full bad

bad

≤^4

> 4 good

(b)

Figure 1.3

Decision trees for the labor negotiations data.