condition mean min max ZT0-3 1043.3 1043.3 1043.3 ZT4-7 3621.6 3621.6 3621.6 ZT8-11 4504.8 4504.8 4504.8 ZT12-15 4011.15 4011.15 4011.15 ZT16-19 2928.7 2928.7 2928.7 ZT20-23 1895.9 1895.9 1895.9