condition mean min max ZT0-3 0.3515655 0.3515655 0.3515655 ZT4-7 0.32493550000000004 0.32493550000000004 0.32493550000000004 ZT8-11 0.353957 0.353957 0.353957 ZT12-15 0.0 0.0 0.0 ZT16-19 0.5662845 0.5662845 0.5662845 ZT20-23 0.3509595 0.3509595 0.3509595