condition mean min max ZT0-3 0.14074666666666666 0.0 0.314085 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2067235 0.2067235 0.2067235 ZT12-15 0.05734075 0.0 0.1146815 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0