condition mean min max ZT0-3 0.0292713 0.0292713 0.0292713 ZT4-7 0.055865 0.055865 0.055865 ZT8-11 0.0150872 0.0150872 0.0150872 ZT12-15 0.0 0.0 0.0 ZT16-19 0.01610545 0.01610545 0.01610545 ZT20-23 0.0644249 0.0644249 0.0644249