condition mean min max ZT0-3 24.0545369225 21.21101631 26.898057535 ZT4-7 31.183230272500005 27.99060185 34.375858695000005 ZT8-11 33.4256528625 32.897829540000004 33.953476185 ZT12-15 27.2288773875 27.16793701 27.289817765000002 ZT16-19 39.5841049875 37.070386525 42.09782345 ZT20-23 48.107415350000004 44.731757110000004 51.483073590000004