horse lame healthy
1  4.3541   -0.9914
2  4.7865   1.4710     
3  6.1945   1.2459     
4  10.7383  0.4024     
5  3.3007   0.0325     
6  4.8678  -0.6396
7  7.8965   0.7246     
8  3.9338   0.0604