condition mean min max ZT0-3 2113.55 2113.55 2113.55 ZT4-7 1563.2 1563.2 1563.2 ZT8-11 1584.25 1584.25 1584.25 ZT12-15 1862.05 1862.05 1862.05 ZT16-19 2035.9 2035.9 2035.9 ZT20-23 1687.6 1687.6 1687.6