condition mean min max ZT0-3 2783.2 2783.2 2783.2 ZT4-7 2050.8 2050.8 2050.8 ZT8-11 1741.1999999999998 1741.1999999999998 1741.1999999999998 ZT12-15 1752.6 1752.6 1752.6 ZT16-19 1891.55 1891.55 1891.55 ZT20-23 2332.6 2332.6 2332.6