condition mean min max ZT0-3 5.6 5.6 5.6 ZT4-7 29.0 29.0 29.0 ZT8-11 26.35 26.35 26.35 ZT12-15 18.1 18.1 18.1 ZT16-19 25.85 25.85 25.85 ZT20-23 44.95 44.95 44.95