condition mean min max ZT0-3 0.11892161525 0.0 0.2378432305 ZT4-7 0.44330567049999997 0.421013692 0.46559764899999995 ZT8-11 0.22233795750000002 0.21907394400000002 0.225601971 ZT12-15 0.07101834675 0.0566898015 0.08534689200000001 ZT16-19 0.17935444025 0.16518428349999997 0.19352459700000002 ZT20-23 0.24181165525000003 0.1326239935 0.35099931700000003