condition mean min max ZT0-3 1456.95 1456.95 1456.95 ZT4-7 2355.1 2355.1 2355.1 ZT8-11 2175.6000000000004 2175.6000000000004 2175.6000000000004 ZT12-15 2246.4 2246.4 2246.4 ZT16-19 1958.8999999999999 1958.8999999999999 1958.8999999999999 ZT20-23 1781.1 1781.1 1781.1