condition mean min max ZT0-3 1.11093825 0.853278 1.3685985 ZT4-7 1.596775 1.596775 1.596775 ZT8-11 5.95453 5.95453 5.95453 ZT12-15 0 0 0 ZT16-19 4.9084 4.9084 4.9084 ZT20-23 2.7618099999999997 2.7618099999999997 2.7618099999999997