condition mean min max ZT0-3 0.0426601 0.0401173 0.04503995 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0902455 0.0902455 0.0902455