condition mean min max ZT0-3 1075.75 1075.75 1075.75 ZT4-7 879.3 879.3 879.3 ZT8-11 785.7 785.7 785.7 ZT12-15 819.15 819.15 819.15 ZT16-19 1063.35 1063.35 1063.35 ZT20-23 1224.15 1224.15 1224.15