condition mean min max ZT0-3 0.05309241375 0.0 0.1061848275 ZT4-7 0.39651604283333336 0.0 0.7930320856666667 ZT8-11 0.0 0.0 0.0 ZT12-15 0.13700554566666667 0.0 0.27401109133333335 ZT16-19 0.0 0.0 0.0 ZT20-23 0.14982553399999998 0.0 0.29965106799999996