condition mean min max ZT0-3 220.85 220.85 220.85 ZT4-7 228.0 228.0 228.0 ZT8-11 258.1 258.1 258.1 ZT12-15 249.3 249.3 249.3 ZT16-19 298.65 298.65 298.65 ZT20-23 224.85000000000002 224.85000000000002 224.85000000000002