condition mean min max ZT0-3 1041.5 1041.5 1041.5 ZT4-7 2762.4 2762.4 2762.4 ZT8-11 2508.25 2508.25 2508.25 ZT12-15 1665.5 1665.5 1665.5 ZT16-19 634.3 634.3 634.3 ZT20-23 757.75 757.75 757.75