condition mean min max ZT0-3 0.08457794575 0.0 0.1691558915 ZT4-7 0.45815315125 0.3141654655 0.602140837 ZT8-11 0.05099134925 0.0 0.1019826985 ZT12-15 0.06708674375000001 0.0 0.13417348750000002 ZT16-19 0.0714430625 0.0 0.142886125 ZT20-23 0.8288461774999999 0.5949306765 1.0627616784999998