condition mean min max ZT0-3 41.805088 41.805088 41.805088 ZT4-7 60.014942500000004 60.014942500000004 60.014942500000004 ZT8-11 49.045716 49.045716 49.045716 ZT12-15 79.9578635 79.9578635 79.9578635 ZT16-19 50.64079100000001 50.64079100000001 50.64079100000001 ZT20-23 38.0213335 38.0213335 38.0213335