condition mean min max ZT0-3 228.89999999999998 228.89999999999998 228.89999999999998 ZT4-7 112.1 112.1 112.1 ZT8-11 201.55 201.55 201.55 ZT12-15 226.05 226.05 226.05 ZT16-19 188.3 188.3 188.3 ZT20-23 249.3 249.3 249.3