condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.03460185316666666 0.021951769 0.04725193733333333 ZT12-15 0.0 0.0 0.0 ZT16-19 0.008667537500000001 0.0 0.017335075000000002 ZT20-23 0.012174041333333331 0.0 0.024348082666666663