condition mean min max ZT0-3 45.65 45.65 45.65 ZT4-7 14.0 14.0 14.0 ZT8-11 47.25 47.25 47.25 ZT12-15 22.2 22.2 22.2 ZT16-19 50.05 50.05 50.05 ZT20-23 45.05 45.05 45.05