condition mean min max ZT0-3 0.077154 0.0 0.154308 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.152149 0.152149 0.152149 ZT20-23 0.0 0.0 0.0