
Model formula:
dist ~ speed

Fitted party:
[1] root
|   [2] speed <= 12: 18.200 (n = 15, err = 1176.4)
|   [3] speed > 12
|   |   [4] speed <= 20: 46.286 (n = 28, err = 7861.7)
|   |   [5] speed > 20: 82.857 (n = 7, err = 2852.9)

Number of inner nodes:    2
Number of terminal nodes: 3
