condition mean min max ZT0-3 0.41800375 0.0 0.8360075 ZT4-7 7.37906 7.37906 7.37906 ZT8-11 0.7863454999999999 0.7863454999999999 0.7863454999999999 ZT12-15 0 0 0 ZT16-19 0.447455 0.447455 0.447455 ZT20-23 1.73037 1.73037 1.73037