condition mean min max ZT0-3 0.25899925 0.0 0.5179985 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03839225 0.0 0.0767845 ZT16-19 0.046097 0.0 0.092194 ZT20-23 0 0 0