condition mean min max ZT0-3 0.004594686 0.0 0.009189372 ZT4-7 0.013804240249999999 0.0 0.027608480499999997 ZT8-11 0.0050962592499999996 0.0 0.010192518499999999 ZT12-15 0.02043932425 0.01304911 0.0278295385 ZT16-19 0.050987217749999994 0.0376699785 0.064304457 ZT20-23 0.05160744875000001 0.031204486 0.07201041150000001