condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.02183346 0.0 0.04366692 ZT8-11 0.0 0.0 0.0 ZT12-15 0.025308322499999997 0.0 0.050616644999999995 ZT16-19 0.0 0.0 0.0 ZT20-23 0.058888599166666666 0.0 0.11777719833333333