condition mean min max ZT0-3 62.5 62.5 62.5 ZT4-7 49.1 49.1 49.1 ZT8-11 44.6 44.6 44.6 ZT12-15 33.05 33.05 33.05 ZT16-19 47.5 47.5 47.5 ZT20-23 45.8 45.8 45.8