condition mean min max ZT0-3 0.11730830799999999 0.0 0.23461661599999997 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.08339458066666666 0.0 0.16678916133333332 ZT20-23 0.07398044533333334 0.0 0.14796089066666668