condition mean min max ZT0-3 0.14570854049999998 0.0 0.29141708099999997 ZT4-7 0.11641139125 0.0 0.2328227825 ZT8-11 0.166085525 0.0878464825 0.2443245675 ZT12-15 0.5946032035 0.55671357 0.632492837 ZT16-19 0.40605458699999997 0.30499484649999997 0.5071143275 ZT20-23 0.36272560575 0.254888127 0.4705630845