condition mean min max ZT0-3 10.3 10.3 10.3 ZT4-7 1.8 1.8 1.8 ZT8-11 0.9 0.9 0.9 ZT12-15 1.05 1.05 1.05 ZT16-19 10.55 10.55 10.55 ZT20-23 8.05 8.05 8.05