condition mean min max ZT0-3 29.65 29.65 29.65 ZT4-7 44.9 44.9 44.9 ZT8-11 42.9 42.9 42.9 ZT12-15 49.35 49.35 49.35 ZT16-19 60.15 60.15 60.15 ZT20-23 29.35 29.35 29.35