condition mean min max ZT0-3 24.55 24.55 24.55 ZT4-7 51.9 51.9 51.9 ZT8-11 37.599999999999994 37.599999999999994 37.599999999999994 ZT12-15 53.6 53.6 53.6 ZT16-19 44.349999999999994 44.349999999999994 44.349999999999994 ZT20-23 54.349999999999994 54.349999999999994 54.349999999999994