condition mean min max ZT0-3 0.5527835375 0.446887708 0.658679367 ZT4-7 0.70999692375 0.32090478050000004 1.099089067 ZT8-11 3.2842579185 2.3283240215 4.240191815499999 ZT12-15 2.8515679845 2.470363146 3.232772823 ZT16-19 2.318734773 2.1749112945 2.4625582515 ZT20-23 2.7104246527500004 2.659524026 2.7613252795000003