condition mean min max ZT0-3 2.0999999999999996 2.0999999999999996 2.0999999999999996 ZT4-7 29.4 29.4 29.4 ZT8-11 12.85 12.85 12.85 ZT12-15 32.75 32.75 32.75 ZT16-19 19.599999999999998 19.599999999999998 19.599999999999998 ZT20-23 37.099999999999994 37.099999999999994 37.099999999999994