condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02014431125 0.0 0.0402886225 ZT12-15 0.023458383500000003 0.0 0.046916767000000005 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0255868865 0.0 0.051173773