condition mean min max ZT0-3 0.62502636925 0.24823853550000002 1.001814203 ZT4-7 0.18754457125 0.12024163199999999 0.2548475105 ZT8-11 0.21335514299999997 0.171133228 0.25557705799999997 ZT12-15 0.225552039 0.21079331850000002 0.2403107595 ZT16-19 1.06789604625 0.9034751615 1.232316931 ZT20-23 1.16191299475 0.8741470259999999 1.4496789635