condition mean min max ZT0-3 85.7 85.7 85.7 ZT4-7 15.4 15.4 15.4 ZT8-11 46.85 46.85 46.85 ZT12-15 55.25 55.25 55.25 ZT16-19 84.8 84.8 84.8 ZT20-23 68.45 68.45 68.45