condition mean min max ZT0-3 1247.65 1247.65 1247.65 ZT4-7 1897.8 1897.8 1897.8 ZT8-11 1813.0 1813.0 1813.0 ZT12-15 1490.0500000000002 1490.0500000000002 1490.0500000000002 ZT16-19 1065.5 1065.5 1065.5 ZT20-23 833.05 833.05 833.05