condition mean min max ZT0-3 4.85 4.85 4.85 ZT4-7 2.0 2.0 2.0 ZT8-11 2.8 2.8 2.8 ZT12-15 16.45 16.45 16.45 ZT16-19 4.85 4.85 4.85 ZT20-23 4.05 4.05 4.05