condition mean min max ZT0-3 46.507175000000004 45.0507 47.96365 ZT4-7 37.7009 37.7009 37.7009 ZT8-11 38.65065 38.65065 38.65065 ZT12-15 0 0 0 ZT16-19 56.86125 56.86125 56.86125 ZT20-23 47.5584 47.5584 47.5584