condition mean min max ZT0-3 0.021883675 0.0 0.04376735 ZT4-7 0.7116005 0.7116005 0.7116005 ZT8-11 0.2180494 0.2180494 0.2180494 ZT12-15 0 0 0 ZT16-19 0.043213 0.043213 0.043213 ZT20-23 0.0 0.0 0.0