condition mean min max ZT0-3 0.013537914 0.0 0.027075828 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03726652625 0.0306825345 0.043850518 ZT16-19 0.2298144865 0.18946848900000002 0.270160484 ZT20-23 0.16389282074999997 0.095915567 0.23187007449999997