condition mean min max ZT0-3 32.018649999999994 25.5901 38.447199999999995 ZT4-7 28.1114 28.1114 28.1114 ZT8-11 24.84615 24.84615 24.84615 ZT12-15 0 0 0 ZT16-19 31.52295 31.52295 31.52295 ZT20-23 25.3337 25.3337 25.3337