condition mean min max ZT0-3 1906.9 1906.9 1906.9 ZT4-7 2316.8 2316.8 2316.8 ZT8-11 2085.95 2085.95 2085.95 ZT12-15 1414.2 1414.2 1414.2 ZT16-19 1111.75 1111.75 1111.75 ZT20-23 1819.5 1819.5 1819.5