condition mean min max ZT0-3 0.47328946666666666 0.3617894 0.6428105 ZT4-7 0.32749649999999997 0.32749649999999997 0.32749649999999997 ZT8-11 0.4483935 0.4483935 0.4483935 ZT12-15 1.11230025 1.1035945 1.121006 ZT16-19 1.098185 1.098185 1.098185 ZT20-23 0.7235199999999999 0.7235199999999999 0.7235199999999999