condition mean min max ZT0-3 1579.5 1579.5 1579.5 ZT4-7 787.8 787.8 787.8 ZT8-11 733.8 733.8 733.8 ZT12-15 757.25 757.25 757.25 ZT16-19 1066.85 1066.85 1066.85 ZT20-23 1395.0 1395.0 1395.0