condition mean min max ZT0-3 8.55 8.55 8.55 ZT4-7 1.1 1.1 1.1 ZT8-11 1.25 1.25 1.25 ZT12-15 13.45 13.45 13.45 ZT16-19 25.85 25.85 25.85 ZT20-23 4.7 4.7 4.7