condition mean min max ZT0-3 0.0987445 0.0987445 0.0987445 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0601275 0.0601275 0.0601275 ZT16-19 0.03962015 0.03962015 0.03962015 ZT20-23 0.0 0.0 0.0