condition mean min max ZT0-3 756.90801 756.90801 756.90801 ZT4-7 943.902388 943.902388 943.902388 ZT8-11 795.791327 795.791327 795.791327 ZT12-15 734.8918555 734.8918555 734.8918555 ZT16-19 853.1141185 853.1141185 853.1141185 ZT20-23 630.5632035000001 630.5632035000001 630.5632035000001