condition mean min max ZT0-3 0.0047831115 0.0 0.009566223 ZT4-7 0.0376075065 0.0 0.075215013 ZT8-11 0.07571233150000001 0.0424420325 0.10898263050000001 ZT12-15 0.06983638075 0.0398113305 0.099861431 ZT16-19 0.070326081 0.056236219000000004 0.084415943 ZT20-23 0.072469795 0.049438385 0.095501205