condition mean min max ZT0-3 587.65 587.65 587.65 ZT4-7 747.2 747.2 747.2 ZT8-11 1042.9 1042.9 1042.9 ZT12-15 1038.3 1038.3 1038.3 ZT16-19 1194.1999999999998 1194.1999999999998 1194.1999999999998 ZT20-23 923.85 923.85 923.85