condition mean min max ZT0-3 78.05 78.05 78.05 ZT4-7 37.6 37.6 37.6 ZT8-11 53.7 53.7 53.7 ZT12-15 57.6 57.6 57.6 ZT16-19 106.8 106.8 106.8 ZT20-23 84.35 84.35 84.35