condition mean min max ZT0-3 0.2733865 0.0 0.643057 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.081201 0.0 0.162402 ZT16-19 0.7638095 0.7638095 0.7638095 ZT20-23 0.1711045 0.1711045 0.1711045