condition mean min max ZT0-3 1928.6999999999998 1928.6999999999998 1928.6999999999998 ZT4-7 2223.6 2223.6 2223.6 ZT8-11 1895.15 1895.15 1895.15 ZT12-15 1946.35 1946.35 1946.35 ZT16-19 1962.0 1962.0 1962.0 ZT20-23 2007.15 2007.15 2007.15