condition mean min max ZT0-3 117.786863 117.786863 117.786863 ZT4-7 78.4665935 78.4665935 78.4665935 ZT8-11 113.04105299999999 113.04105299999999 113.04105299999999 ZT12-15 151.5828415 151.5828415 151.5828415 ZT16-19 169.4795265 169.4795265 169.4795265 ZT20-23 175.459356 175.459356 175.459356