condition mean min max ZT0-3 67.75 67.75 67.75 ZT4-7 150.7 150.7 150.7 ZT8-11 92.8 92.8 92.8 ZT12-15 153.0 153.0 153.0 ZT16-19 106.65 106.65 106.65 ZT20-23 86.9 86.9 86.9