condition mean min max ZT0-3 0.0208964 0.0 0.0417928 ZT4-7 0.0139563 0.0139563 0.0139563 ZT8-11 0.01400445 0.01400445 0.01400445 ZT12-15 0 0 0 ZT16-19 0.0558285 0.0558285 0.0558285 ZT20-23 0.01405865 0.01405865 0.01405865