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 0.0 0.0 0.0 ZT16-19 0.03601390175 0.0 0.0720278035 ZT20-23 0.056988974500000004 0.0 0.11397794900000001