condition mean min max ZT0-3 81.384425 73.99015 88.7787 ZT4-7 44.32065 44.32065 44.32065 ZT8-11 69.44105 69.44105 69.44105 ZT12-15 0 0 0 ZT16-19 81.75005 81.75005 81.75005 ZT20-23 63.9488 63.9488 63.9488