condition mean min max ZT0-3 0.027537000000000002 0.0 0.082611 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.134994 0.0 0.269988 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0929185 0.0929185 0.0929185