condition mean min max ZT0-3 0.018800274999999998 0.018800274999999998 0.018800274999999998 ZT4-7 0.016346916666666666 0.016346916666666666 0.016346916666666666 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03151325 0.03151325 0.03151325 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0