condition mean min max ZT0-3 0.08258283333333334 0.02957145 0.124853 ZT4-7 0.0289354 0.0289354 0.0289354 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 0.03201865 0.03201865 0.03201865