condition mean min max ZT0-3 43.4 43.4 43.4 ZT4-7 103.3 103.3 103.3 ZT8-11 55.0 55.0 55.0 ZT12-15 48.05 48.05 48.05 ZT16-19 38.099999999999994 38.099999999999994 38.099999999999994 ZT20-23 31.8 31.8 31.8