condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.05737134466666667 0.0 0.11474268933333334 ZT12-15 0.0 0.0 0.0 ZT16-19 0.017573849500000002 0.0 0.035147699000000004 ZT20-23 0.008834174 0.0 0.017668348