condition mean min max ZT0-3 36.0 36.0 36.0 ZT4-7 48.8 48.8 48.8 ZT8-11 44.65 44.65 44.65 ZT12-15 47.349999999999994 47.349999999999994 47.349999999999994 ZT16-19 27.4 27.4 27.4 ZT20-23 35.05 35.05 35.05