condition mean min max ZT0-3 70.887675 63.2346 78.54075 ZT4-7 57.7798 57.7798 57.7798 ZT8-11 67.25585000000001 67.25585000000001 67.25585000000001 ZT12-15 0 0 0 ZT16-19 125.357 125.357 125.357 ZT20-23 116.4785 116.4785 116.4785