condition mean min max ZT0-3 38.05 38.05 38.05 ZT4-7 81.3 81.3 81.3 ZT8-11 69.55 69.55 69.55 ZT12-15 62.55 62.55 62.55 ZT16-19 44.3 44.3 44.3 ZT20-23 64.7 64.7 64.7