condition mean min max ZT0-3 25.77935 20.625700000000002 33.9581 ZT4-7 25.7945 25.7945 25.7945 ZT8-11 32.5946 32.5946 32.5946 ZT12-15 41.919 39.56875 44.26925 ZT16-19 35.1964 35.1964 35.1964 ZT20-23 42.58855 42.58855 42.58855