condition mean min max ZT0-3 53.099999999999994 53.099999999999994 53.099999999999994 ZT4-7 3.1 3.1 3.1 ZT8-11 35.35 35.35 35.35 ZT12-15 23.7 23.7 23.7 ZT16-19 44.35 44.35 44.35 ZT20-23 47.099999999999994 47.099999999999994 47.099999999999994