condition mean min max ZT0-3 1855.95 1855.95 1855.95 ZT4-7 1316.3 1316.3 1316.3 ZT8-11 1317.4499999999998 1317.4499999999998 1317.4499999999998 ZT12-15 1596.1999999999998 1596.1999999999998 1596.1999999999998 ZT16-19 1892.0 1892.0 1892.0 ZT20-23 1937.05 1937.05 1937.05