condition mean min max ZT0-3 397.230012 397.230012 397.230012 ZT4-7 356.991674 356.991674 356.991674 ZT8-11 416.4878405 416.4878405 416.4878405 ZT12-15 289.655842 289.655842 289.655842 ZT16-19 372.3258485 372.3258485 372.3258485 ZT20-23 364.160433 364.160433 364.160433