condition mean min max ZT0-3 44.465411 44.465411 44.465411 ZT4-7 45.529233500000004 45.529233500000004 45.529233500000004 ZT8-11 41.95303 41.95303 41.95303 ZT12-15 38.9885695 38.9885695 38.9885695 ZT16-19 49.991975 49.991975 49.991975 ZT20-23 45.847374 45.847374 45.847374