condition mean min max ZT0-3 35.258624999999995 34.347049999999996 36.170199999999994 ZT4-7 36.36985 36.36985 36.36985 ZT8-11 38.23325 38.23325 38.23325 ZT12-15 0 0 0 ZT16-19 48.58005 48.58005 48.58005 ZT20-23 35.8066 35.8066 35.8066