condition mean min max ZT0-3 48.9231 47.479299999999995 49.7899 ZT4-7 47.46565 47.46565 47.46565 ZT8-11 43.935500000000005 43.935500000000005 43.935500000000005 ZT12-15 63.971725 60.43615 67.5073 ZT16-19 68.55475 68.55475 68.55475 ZT20-23 66.3361 66.3361 66.3361