condition mean min max ZT0-3 0.028695175 0.0 0.05739035 ZT4-7 0.08784185 0.08784185 0.08784185 ZT8-11 0.02874065 0.02874065 0.02874065 ZT12-15 0 0 0 ZT16-19 0.02853095 0.02853095 0.02853095 ZT20-23 0.0286108 0.0286108 0.0286108