condition mean min max ZT0-3 49.6975 49.6975 49.6975 ZT4-7 38.1473 38.1473 38.1473 ZT8-11 34.971000000000004 34.971000000000004 34.971000000000004 ZT12-15 42.77785 42.77785 42.77785 ZT16-19 59.9036 59.9036 59.9036 ZT20-23 51.97345 51.97345 51.97345