condition mean min max ZT0-3 0.08991683333333333 0.0 0.2697505 ZT4-7 0.0166842 0.0166842 0.0166842 ZT8-11 0.0 0.0 0.0 ZT12-15 0.04125875 0.0 0.0825175 ZT16-19 0.0394832 0.0394832 0.0394832 ZT20-23 0.0 0.0 0.0