condition mean min max ZT0-3 35.7 35.7 35.7 ZT4-7 55.2 55.2 55.2 ZT8-11 67.05 67.05 67.05 ZT12-15 80.3 80.3 80.3 ZT16-19 93.05 93.05 93.05 ZT20-23 58.099999999999994 58.099999999999994 58.099999999999994