condition mean min max ZT0-3 56.3913 48.628299999999996 61.33785 ZT4-7 72.49905000000001 72.49905000000001 72.49905000000001 ZT8-11 41.792100000000005 41.792100000000005 41.792100000000005 ZT12-15 63.660925 54.528949999999995 72.7929 ZT16-19 66.6386 66.6386 66.6386 ZT20-23 73.9335 73.9335 73.9335