condition mean min max ZT0-3 47.0 47.0 47.0 ZT4-7 60.8 60.8 60.8 ZT8-11 52.9 52.9 52.9 ZT12-15 112.7 112.7 112.7 ZT16-19 115.0 115.0 115.0 ZT20-23 103.95 103.95 103.95