treatment y
1 11.6
2 8.5
3 14.5
4 12.3
5 13.9
1 10
2 9.7
3 14.5
4 12.9
5 16.1
1 10.5
2 6.7
3 13.3
4 11.4
5 14.3
1 10.6
2 7.5
3 14.8
4 12.4
5 13.7
1 10.7
2 6.7
3 14.4
4 11.6
5 14.9