condition mean min max ZT0-3 67.9 67.9 67.9 ZT4-7 115.0 115.0 115.0 ZT8-11 72.35 72.35 72.35 ZT12-15 106.75 106.75 106.75 ZT16-19 97.4 97.4 97.4 ZT20-23 95.05 95.05 95.05