condition mean min max ZT0-3 1029.790189 1029.790189 1029.790189 ZT4-7 630.188953 630.188953 630.188953 ZT8-11 1007.5145775000001 1007.5145775000001 1007.5145775000001 ZT12-15 1234.4872455 1234.4872455 1234.4872455 ZT16-19 2175.0174235 2175.0174235 2175.0174235 ZT20-23 2112.5283675 2112.5283675 2112.5283675