condition mean min max ZT0-3 3367.8999999999996 3367.8999999999996 3367.8999999999996 ZT4-7 7164.4 7164.4 7164.4 ZT8-11 5775.35 5775.35 5775.35 ZT12-15 2716.25 2716.25 2716.25 ZT16-19 3726.8500000000004 3726.8500000000004 3726.8500000000004 ZT20-23 4474.5 4474.5 4474.5