condition mean min max ZT0-3 37.462999999999994 37.462999999999994 37.462999999999994 ZT4-7 31.48445 31.48445 31.48445 ZT8-11 40.523799999999994 40.523799999999994 40.523799999999994 ZT12-15 50.754999999999995 50.754999999999995 50.754999999999995 ZT16-19 44.1972 44.1972 44.1972 ZT20-23 38.5981 38.5981 38.5981