condition mean min max ZT0-3 37.099999999999994 37.099999999999994 37.099999999999994 ZT4-7 89.7 89.7 89.7 ZT8-11 85.65 85.65 85.65 ZT12-15 47.5 47.5 47.5 ZT16-19 50.449999999999996 50.449999999999996 50.449999999999996 ZT20-23 62.599999999999994 62.599999999999994 62.599999999999994