condition mean min max ZT0-3 1053.4 1053.4 1053.4 ZT4-7 737.1 737.1 737.1 ZT8-11 801.6 801.6 801.6 ZT12-15 1148.05 1148.05 1148.05 ZT16-19 1620.8 1620.8 1620.8 ZT20-23 1558.0 1558.0 1558.0