condition mean min max ZT0-3 58.9 58.9 58.9 ZT4-7 47.3 47.3 47.3 ZT8-11 57.2 57.2 57.2 ZT12-15 55.95 55.95 55.95 ZT16-19 90.15 90.15 90.15 ZT20-23 110.25 110.25 110.25