condition mean min max ZT0-3 1648.4 1648.4 1648.4 ZT4-7 1451.9 1451.9 1451.9 ZT8-11 1971.6000000000001 1971.6000000000001 1971.6000000000001 ZT12-15 2335.1499999999996 2335.1499999999996 2335.1499999999996 ZT16-19 2486.2 2486.2 2486.2 ZT20-23 2476.3 2476.3 2476.3