condition mean min max ZT0-3 78.95785000000001 69.9377 89.1572 ZT4-7 72.94415000000001 72.94415000000001 72.94415000000001 ZT8-11 70.92165 70.92165 70.92165 ZT12-15 74.45082500000001 67.44085000000001 81.4608 ZT16-19 67.92175 67.92175 67.92175 ZT20-23 90.1927 90.1927 90.1927