condition mean min max ZT0-3 3961.05 3961.05 3961.05 ZT4-7 5356.8 5356.8 5356.8 ZT8-11 4627.2 4627.2 4627.2 ZT12-15 2707.8 2707.8 2707.8 ZT16-19 2086.0 2086.0 2086.0 ZT20-23 2789.1499999999996 2789.1499999999996 2789.1499999999996