condition mean min max ZT0-3 0.588425618 0.46950713299999997 0.7073441030000001 ZT4-7 1.3453924879999999 1.133725882 1.557059094 ZT8-11 1.97911110275 1.4736686285 2.484553577 ZT12-15 3.6066338782500003 2.8567895475 4.3564782090000005 ZT16-19 3.252104568 2.8107616505 3.6934474855 ZT20-23 6.2785092845 5.313820254 7.243198315