condition mean min max ZT0-3 106.613488 106.613488 106.613488 ZT4-7 104.599381 104.599381 104.599381 ZT8-11 92.06603799999999 92.06603799999999 92.06603799999999 ZT12-15 77.851987 77.851987 77.851987 ZT16-19 78.22498300000001 78.22498300000001 78.22498300000001 ZT20-23 76.0941935 76.0941935 76.0941935