condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.586985 0.586985 0.586985 ZT8-11 0.0 0.0 0.0 ZT12-15 0.1486875 0.0 0.297375 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0