condition mean min max ZT0-3 0.02789466666666667 0.0 0.04235395 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.170193175 0.124309 0.21607735 ZT16-19 0.082306 0.082306 0.082306 ZT20-23 0.0 0.0 0.0