condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.01501576375 0.0 0.0300315275 ZT12-15 0.032887888500000004 0.0 0.06577577700000001 ZT16-19 0.0 0.0 0.0 ZT20-23 0.02397889175 0.0 0.0479577835