condition mean min max ZT0-3 0.28487406375 0.0 0.5697481275 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0177069415 0.0 0.035413883 ZT12-15 0.0 0.0 0.0 ZT16-19 0.016889673666666664 0.0 0.03377934733333333 ZT20-23 0.0 0.0 0.0