condition mean min max ZT0-3 0.00915331825 0.0060149654999999995 0.012291671 ZT4-7 0.005419024 0.0034227055 0.0074153425 ZT8-11 0.027922076499999997 0.010866676999999998 0.044977475999999995 ZT12-15 0.054446731250000005 0.04920117 0.05969229250000001 ZT16-19 0.02890100875 0.0216950125 0.036107005 ZT20-23 0.036081232500000004 0.0149985625 0.0571639025