condition mean min max ZT0-3 745.0 745.0 745.0 ZT4-7 684.4 684.4 684.4 ZT8-11 575.5 575.5 575.5 ZT12-15 470.05 470.05 470.05 ZT16-19 633.45 633.45 633.45 ZT20-23 678.95 678.95 678.95