condition mean min max ZT0-3 1401.9 1401.9 1401.9 ZT4-7 1646.4 1646.4 1646.4 ZT8-11 1579.4499999999998 1579.4499999999998 1579.4499999999998 ZT12-15 1819.1 1819.1 1819.1 ZT16-19 1786.55 1786.55 1786.55 ZT20-23 1654.25 1654.25 1654.25