condition mean min max ZT0-3 0.7524532500000001 0.406098 1.0988085 ZT4-7 0.04009285 0.04009285 0.04009285 ZT8-11 0.0816251 0.0816251 0.0816251 ZT12-15 0 0 0 ZT16-19 0.599381 0.599381 0.599381 ZT20-23 0.0 0.0 0.0