condition mean min max ZT0-3 0.44272653449999994 0.153054948 0.7323981209999999 ZT4-7 8.17540290725 4.8108107125 11.539995101999999 ZT8-11 16.63943102 15.33336824 17.9454938 ZT12-15 13.8232187425 12.420077025 15.22636046 ZT16-19 28.024125570000002 20.974224535 35.074026605 ZT20-23 68.8209766875 55.07971649 82.562236885