condition mean min max ZT0-3 4.44314 4.44314 4.44314 ZT4-7 18.6169 18.6169 18.6169 ZT8-11 11.60155 11.60155 11.60155 ZT12-15 7.08331 7.08331 7.08331 ZT16-19 7.694015 7.694015 7.694015 ZT20-23 2.1559 2.1559 2.1559