condition mean min max ZT0-3 112.980819 112.980819 112.980819 ZT4-7 98.194136 98.194136 98.194136 ZT8-11 62.6144805 62.6144805 62.6144805 ZT12-15 66.8924545 66.8924545 66.8924545 ZT16-19 47.430922499999994 47.430922499999994 47.430922499999994 ZT20-23 56.777556000000004 56.777556000000004 56.777556000000004