condition mean min max ZT0-3 137.55 137.55 137.55 ZT4-7 67.8 67.8 67.8 ZT8-11 73.6 73.6 73.6 ZT12-15 80.0 80.0 80.0 ZT16-19 150.65 150.65 150.65 ZT20-23 141.0 141.0 141.0