condition mean min max ZT0-3 2196.45 2196.45 2196.45 ZT4-7 2837.5 2837.5 2837.5 ZT8-11 2698.85 2698.85 2698.85 ZT12-15 2341.9 2341.9 2341.9 ZT16-19 2252.3 2252.3 2252.3 ZT20-23 1998.9 1998.9 1998.9