condition mean min max ZT0-3 0.01226885 0.01226885 0.01226885 ZT4-7 0.0142652 0.0142652 0.0142652 ZT8-11 0.0467998 0.0467998 0.0467998 ZT12-15 0.0 0.0 0.0 ZT16-19 0.02504775 0.02504775 0.02504775 ZT20-23 0.049628649999999996 0.049628649999999996 0.049628649999999996