data	group
1	8.8	0
2	8.4	0
3	7.9	0
4	8.7	0
5	9.1	0
6	9.6	0
7	9.9	1
8	9	1
9	11.1	1
10	9.6	1
11	8.7	1
12	10.4	1
13	9.5	1