condition mean min max ZT0-3 1204.8 1204.8 1204.8 ZT4-7 624.5 624.5 624.5 ZT8-11 477.6 477.6 477.6 ZT12-15 803.6500000000001 803.6500000000001 803.6500000000001 ZT16-19 1171.9 1171.9 1171.9 ZT20-23 1230.65 1230.65 1230.65