condition mean min max ZT0-3 1.0474965 0.855496 1.239497 ZT4-7 0.357847 0.357847 0.357847 ZT8-11 1.53017 1.53017 1.53017 ZT12-15 0 0 0 ZT16-19 4.6537299999999995 4.6537299999999995 4.6537299999999995 ZT20-23 1.15659 1.15659 1.15659