condition mean min max ZT0-3 0.02483965 0.02483965 0.02483965 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02880165 0.02880165 0.02880165 ZT16-19 0.02517405 0.02517405 0.02517405 ZT20-23 0.06285485 0.06285485 0.06285485