condition mean min max ZT0-3 143.85 143.85 143.85 ZT4-7 0.9 0.9 0.9 ZT8-11 81.35 81.35 81.35 ZT12-15 231.6 231.6 231.6 ZT16-19 172.85000000000002 172.85000000000002 172.85000000000002 ZT20-23 52.45 52.45 52.45