condition mean min max ZT0-3 2522.6000000000004 2522.6000000000004 2522.6000000000004 ZT4-7 1820.4 1820.4 1820.4 ZT8-11 1370.1 1370.1 1370.1 ZT12-15 1524.5 1524.5 1524.5 ZT16-19 1735.2 1735.2 1735.2 ZT20-23 2230.6499999999996 2230.6499999999996 2230.6499999999996