Model Performance
#	Complexity	split	relative error	CV error	CV S.D.
1	0.261	0	1	1.028	0.15
2	0.054	1	0.739	0.768	0.127
3	0.027	3	0.631	0.862	0.152
4	0.022	4	0.604	0.875	0.149
5	0.01	5	0.582	0.824	0.143