condition mean min max ZT0-3 0.0176305 0.0 0.0528915 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.023657925 0.0 0.04731585 ZT16-19 0.0452795 0.0452795 0.0452795 ZT20-23 0.0 0.0 0.0