condition mean min max ZT0-3 41.05 41.05 41.05 ZT4-7 44.7 44.7 44.7 ZT8-11 13.85 13.85 13.85 ZT12-15 34.5 34.5 34.5 ZT16-19 61.3 61.3 61.3 ZT20-23 46.15 46.15 46.15