condition mean min max ZT0-3 67.6 67.6 67.6 ZT4-7 62.8 62.8 62.8 ZT8-11 82.45 82.45 82.45 ZT12-15 103.6 103.6 103.6 ZT16-19 107.75 107.75 107.75 ZT20-23 85.0 85.0 85.0