condition mean min max ZT0-3 46.15 46.15 46.15 ZT4-7 41.9 41.9 41.9 ZT8-11 37.55 37.55 37.55 ZT12-15 23.25 23.25 23.25 ZT16-19 52.45 52.45 52.45 ZT20-23 68.4 68.4 68.4