condition mean min max ZT0-3 0.05253045 0.0255025 0.07972735 ZT4-7 0.328635 0.328635 0.328635 ZT8-11 0.4470345 0.4470345 0.4470345 ZT12-15 0.3718445 0.19294850000000002 0.5507405000000001 ZT16-19 0.27425900000000003 0.27425900000000003 0.27425900000000003 ZT20-23 0.16699495 0.16699495 0.16699495