condition mean min max ZT0-3 3238.8500000000004 3238.8500000000004 3238.8500000000004 ZT4-7 5626.4 5626.4 5626.4 ZT8-11 7489.6 7489.6 7489.6 ZT12-15 7841.400000000001 7841.400000000001 7841.400000000001 ZT16-19 5360.05 5360.05 5360.05 ZT20-23 4063.15 4063.15 4063.15