condition mean min max ZT0-3 13.953399999999998 13.953399999999998 13.953399999999998 ZT4-7 9.204945 9.204945 9.204945 ZT8-11 9.883645 9.883645 9.883645 ZT12-15 13.68945 13.68945 13.68945 ZT16-19 16.3087 16.3087 16.3087 ZT20-23 16.31045 16.31045 16.31045