condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0243295 0.0243295 0.0243295 ZT12-15 0.02835215 0.02835215 0.02835215 ZT16-19 0.022407 0.022407 0.022407 ZT20-23 0.0 0.0 0.0