condition mean min max ZT0-3 280.3 280.3 280.3 ZT4-7 108.5 108.5 108.5 ZT8-11 121.25 121.25 121.25 ZT12-15 183.7 183.7 183.7 ZT16-19 312.1 312.1 312.1 ZT20-23 346.85 346.85 346.85