condition mean min max ZT0-3 37.849999999999994 37.849999999999994 37.849999999999994 ZT4-7 26.2 26.2 26.2 ZT8-11 22.55 22.55 22.55 ZT12-15 36.349999999999994 36.349999999999994 36.349999999999994 ZT16-19 21.05 21.05 21.05 ZT20-23 50.65 50.65 50.65