condition mean min max ZT0-3 14.3 14.3 14.3 ZT4-7 67.6 67.6 67.6 ZT8-11 38.35 38.35 38.35 ZT12-15 37.75 37.75 37.75 ZT16-19 101.55 101.55 101.55 ZT20-23 60.45 60.45 60.45