condition mean min max ZT0-3 2027.8000000000002 2027.8000000000002 2027.8000000000002 ZT4-7 1696.1 1696.1 1696.1 ZT8-11 1736.1 1736.1 1736.1 ZT12-15 1724.4499999999998 1724.4499999999998 1724.4499999999998 ZT16-19 2015.55 2015.55 2015.55 ZT20-23 2178.15 2178.15 2178.15