condition mean min max ZT0-3 143.378356 143.378356 143.378356 ZT4-7 141.7934635 141.7934635 141.7934635 ZT8-11 123.02471399999999 123.02471399999999 123.02471399999999 ZT12-15 115.6851745 115.6851745 115.6851745 ZT16-19 120.9448045 120.9448045 120.9448045 ZT20-23 137.496952 137.496952 137.496952