condition mean min max ZT0-3 0.035175304500000004 0.0 0.07035060900000001 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.05872203533333334 0.019865711666666667 0.097578359 ZT16-19 0.029357471500000003 0.017335075000000002 0.041379868 ZT20-23 0.010968507333333334 0.0 0.021937014666666668