condition mean min max ZT0-3 120.05000000000001 120.05000000000001 120.05000000000001 ZT4-7 82.6 82.6 82.6 ZT8-11 81.45 81.45 81.45 ZT12-15 98.15 98.15 98.15 ZT16-19 131.95 131.95 131.95 ZT20-23 121.44999999999999 121.44999999999999 121.44999999999999