condition mean min max ZT0-3 84.5 84.5 84.5 ZT4-7 70.3 70.3 70.3 ZT8-11 82.9 82.9 82.9 ZT12-15 89.55 89.55 89.55 ZT16-19 87.5 87.5 87.5 ZT20-23 62.65 62.65 62.65