condition mean min max ZT0-3 0.00818355 0.0 0.02455065 ZT4-7 0.01247265 0.01247265 0.01247265 ZT8-11 0.0253543 0.0253543 0.0253543 ZT12-15 0.038000875 0.0369863 0.03901545 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0404365 0.0404365 0.0404365