condition mean min max ZT0-3 67.46915 67.46915 67.46915 ZT4-7 55.637 55.637 55.637 ZT8-11 49.46725 49.46725 49.46725 ZT12-15 46.67935 46.67935 46.67935 ZT16-19 72.9226 72.9226 72.9226 ZT20-23 67.04830000000001 67.04830000000001 67.04830000000001