condition mean min max ZT0-3 6160.65 6160.65 6160.65 ZT4-7 7514.3 7514.3 7514.3 ZT8-11 8260.0 8260.0 8260.0 ZT12-15 8073.35 8073.35 8073.35 ZT16-19 5708.0 5708.0 5708.0 ZT20-23 5273.700000000001 5273.700000000001 5273.700000000001