condition mean min max ZT0-3 62.2 62.2 62.2 ZT4-7 78.6 78.6 78.6 ZT8-11 86.15 86.15 86.15 ZT12-15 52.3 52.3 52.3 ZT16-19 46.8 46.8 46.8 ZT20-23 57.7 57.7 57.7