condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.105795 0.105795 0.105795 ZT12-15 0 0 0 ZT16-19 0.1037315 0.1037315 0.1037315 ZT20-23 0.0 0.0 0.0