condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.020824288 0.0 0.041648576 ZT12-15 0.0200843675 0.0 0.040168735 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0137351185 0.0 0.027470237