condition mean min max ZT0-3 2.0317800000000004 2.0317800000000004 2.0317800000000004 ZT4-7 2.19968 2.19968 2.19968 ZT8-11 0.4717695 0.4717695 0.4717695 ZT12-15 0.382774 0.382774 0.382774 ZT16-19 1.318346 1.318346 1.318346 ZT20-23 1.2233749999999999 1.2233749999999999 1.2233749999999999