i not understand the use of  "±" in some paper for evaluation KITTI VO 

like is

Method                            Seq. 09                  Seq. 10
ORB-SLAM (full)         0.014 ± 0.008          0.012 ± 0.011
ORB-SLAM (short)      0.064 ± 0.141          0.064 ± 0.130
Mean Odom.              0.032 ± 0.026          0.028 ± 0.023

is mean Average sequence translational RMSE (%) ± Average sequence rotational error (deg/m) ???
thank u first