condition mean min max ZT0-3 0.0161845 0.0 0.032369 ZT4-7 0.0329229 0.0329229 0.0329229 ZT8-11 0.065782 0.065782 0.065782 ZT12-15 0 0 0 ZT16-19 0.03185925 0.03185925 0.03185925 ZT20-23 0.0 0.0 0.0