condition mean min max ZT0-3 755.0 755.0 755.0 ZT4-7 883.5 883.5 883.5 ZT8-11 657.95 657.95 657.95 ZT12-15 768.5 768.5 768.5 ZT16-19 709.2 709.2 709.2 ZT20-23 797.0 797.0 797.0