condition mean min max ZT0-3 0.03065675 0.03065675 0.03065675 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 0.04377325 0.04377325 0.04377325 ZT20-23 0.0 0.0 0.0