condition mean min max ZT0-3 85.55 85.55 85.55 ZT4-7 74.6 74.6 74.6 ZT8-11 239.5 239.5 239.5 ZT12-15 172.1 172.1 172.1 ZT16-19 165.05 165.05 165.05 ZT20-23 231.8 231.8 231.8