condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.06524765 0.06524765 0.06524765 ZT8-11 0.0643955 0.0643955 0.0643955 ZT12-15 0 0 0 ZT16-19 0.0319629 0.0319629 0.0319629 ZT20-23 0.06437480000000001 0.06437480000000001 0.06437480000000001