condition mean min max ZT0-3 56.75 56.75 56.75 ZT4-7 5.9 5.9 5.9 ZT8-11 15.35 15.35 15.35 ZT12-15 56.35 56.35 56.35 ZT16-19 27.9 27.9 27.9 ZT20-23 57.099999999999994 57.099999999999994 57.099999999999994