condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0173391 0.0173391 0.0173391 ZT12-15 0.0158117 0.0158117 0.0158117 ZT16-19 0.0414606 0.0414606 0.0414606 ZT20-23 0.0138514 0.0138514 0.0138514