condition mean min max ZT0-3 0.03824775 0.0 0.078097 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.038843475 0.0367405 0.04094645 ZT16-19 0.0351593 0.0351593 0.0351593 ZT20-23 0.03967895 0.03967895 0.03967895