condition mean min max ZT0-3 56.8 56.8 56.8 ZT4-7 121.5 121.5 121.5 ZT8-11 149.7 149.7 149.7 ZT12-15 66.55 66.55 66.55 ZT16-19 106.25 106.25 106.25 ZT20-23 74.9 74.9 74.9