condition mean min max ZT0-3 62.800519 62.800519 62.800519 ZT4-7 74.465683 74.465683 74.465683 ZT8-11 87.9764855 87.9764855 87.9764855 ZT12-15 67.7379765 67.7379765 67.7379765 ZT16-19 66.0489635 66.0489635 66.0489635 ZT20-23 69.92534699999999 69.92534699999999 69.92534699999999