condition mean min max ZT0-3 61.8 61.8 61.8 ZT4-7 52.3 52.3 52.3 ZT8-11 63.7 63.7 63.7 ZT12-15 104.7 104.7 104.7 ZT16-19 107.4 107.4 107.4 ZT20-23 97.6 97.6 97.6