condition mean min max ZT0-3 53.7 53.7 53.7 ZT4-7 58.9 58.9 58.9 ZT8-11 82.25 82.25 82.25 ZT12-15 121.2 121.2 121.2 ZT16-19 75.0 75.0 75.0 ZT20-23 65.85 65.85 65.85