condition mean min max ZT0-3 1718.65 1718.65 1718.65 ZT4-7 1928.5 1928.5 1928.5 ZT8-11 1558.1999999999998 1558.1999999999998 1558.1999999999998 ZT12-15 1570.05 1570.05 1570.05 ZT16-19 1608.3000000000002 1608.3000000000002 1608.3000000000002 ZT20-23 1659.1 1659.1 1659.1