condition mean min max ZT0-3 14.333186734999998 12.67212358 15.994249889999999 ZT4-7 16.2081885 15.369805785 17.046571215 ZT8-11 16.951310909999997 16.56005394 17.342567879999997 ZT12-15 14.297097327500001 14.07235728 14.521837375 ZT16-19 20.259150775000002 17.88160306 22.63669849 ZT20-23 28.627277907499998 27.985551119999997 29.269004695