condition mean min max ZT0-3 0.014801166666666666 0.014801166666666666 0.014801166666666666 ZT4-7 0.03672475 0.03672475 0.03672475 ZT8-11 0.019109249999999998 0.019109249999999998 0.019109249999999998 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01952825 0.01952825 0.01952825