condition mean min max ZT0-3 28.784750000000003 28.784750000000003 28.784750000000003 ZT4-7 25.329 25.329 25.329 ZT8-11 19.4864 19.4864 19.4864 ZT12-15 24.24475 24.24475 24.24475 ZT16-19 27.83155 27.83155 27.83155 ZT20-23 26.854999999999997 26.854999999999997 26.854999999999997