condition mean min max ZT0-3 628.8 628.8 628.8 ZT4-7 1263.7 1263.7 1263.7 ZT8-11 1500.25 1500.25 1500.25 ZT12-15 1644.15 1644.15 1644.15 ZT16-19 1205.95 1205.95 1205.95 ZT20-23 735.75 735.75 735.75