condition mean min max ZT0-3 47.05 47.05 47.05 ZT4-7 54.2 54.2 54.2 ZT8-11 34.65 34.65 34.65 ZT12-15 57.35 57.35 57.35 ZT16-19 49.85 49.85 49.85 ZT20-23 33.9 33.9 33.9