condition mean min max ZT0-3 1947.8000000000002 1947.8000000000002 1947.8000000000002 ZT4-7 2031.7 2031.7 2031.7 ZT8-11 2477.65 2477.65 2477.65 ZT12-15 2921.2 2921.2 2921.2 ZT16-19 2715.1 2715.1 2715.1 ZT20-23 2321.45 2321.45 2321.45