condition mean min max ZT0-3 0.065763 0.0 0.131526 ZT4-7 0.0439217 0.0439217 0.0439217 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.04375165 0.04375165 0.04375165 ZT20-23 0.04387405 0.04387405 0.04387405