condition mean min max ZT0-3 40.25 40.25 40.25 ZT4-7 50.9 50.9 50.9 ZT8-11 62.8 62.8 62.8 ZT12-15 32.3 32.3 32.3 ZT16-19 40.45 40.45 40.45 ZT20-23 52.8 52.8 52.8