condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.101391 0.0 0.202782 ZT16-19 0.0671315 0.0671315 0.0671315 ZT20-23 0.0 0.0 0.0