condition mean min max ZT0-3 57.586744 57.586744 57.586744 ZT4-7 52.4565475 52.4565475 52.4565475 ZT8-11 44.638027 44.638027 44.638027 ZT12-15 48.005125500000005 48.005125500000005 48.005125500000005 ZT16-19 41.264481 41.264481 41.264481 ZT20-23 34.243506499999995 34.243506499999995 34.243506499999995