condition mean min max ZT0-3 0.0060589265 0.0 0.012117853 ZT4-7 0.00910169675 0.0 0.0182033935 ZT8-11 0.018724483 0.0177272625 0.0197217035 ZT12-15 0.01578502925 0.008603809 0.0229662495 ZT16-19 0.013769068499999999 0.011872715 0.015665422 ZT20-23 0.030654209499999998 0.026836910999999998 0.034471508