condition mean min max ZT0-3 39.126850000000005 39.126850000000005 39.126850000000005 ZT4-7 42.792500000000004 42.792500000000004 42.792500000000004 ZT8-11 19.266599999999997 19.266599999999997 19.266599999999997 ZT12-15 9.04486 9.04486 9.04486 ZT16-19 15.093300000000001 15.093300000000001 15.093300000000001 ZT20-23 25.4961 25.4961 25.4961