condition mean min max ZT0-3 0.28897533333333336 0.263593 0.3160255 ZT4-7 0.259737 0.259737 0.259737 ZT8-11 1.549735 1.549735 1.549735 ZT12-15 1.8972224999999998 1.78636 2.008085 ZT16-19 0.6214925 0.6214925 0.6214925 ZT20-23 0.580205 0.580205 0.580205