condition mean min max ZT0-3 65.6 65.6 65.6 ZT4-7 86.8 86.8 86.8 ZT8-11 108.85 108.85 108.85 ZT12-15 153.7 153.7 153.7 ZT16-19 146.8 146.8 146.8 ZT20-23 113.9 113.9 113.9