condition mean min max ZT0-3 8819.5 8819.5 8819.5 ZT4-7 7939.5 7939.5 7939.5 ZT8-11 6746.1 6746.1 6746.1 ZT12-15 6473.55 6473.55 6473.55 ZT16-19 7513.85 7513.85 7513.85 ZT20-23 9163.7 9163.7 9163.7