condition mean min max ZT0-3 386.648891 386.648891 386.648891 ZT4-7 1030.015044 1030.015044 1030.015044 ZT8-11 2108.9871335 2108.9871335 2108.9871335 ZT12-15 1891.0782104999998 1891.0782104999998 1891.0782104999998 ZT16-19 1036.2851915 1036.2851915 1036.2851915 ZT20-23 596.31603 596.31603 596.31603