condition mean min max ZT0-3 2988.5 2988.5 2988.5 ZT4-7 12977.3 12977.3 12977.3 ZT8-11 14587.400000000001 14587.400000000001 14587.400000000001 ZT12-15 9331.800000000001 9331.800000000001 9331.800000000001 ZT16-19 4112.85 4112.85 4112.85 ZT20-23 3409.9 3409.9 3409.9