condition mean min max ZT0-3 60.8 60.8 60.8 ZT4-7 35.4 35.4 35.4 ZT8-11 68.9 68.9 68.9 ZT12-15 96.3 96.3 96.3 ZT16-19 85.2 85.2 85.2 ZT20-23 81.15 81.15 81.15