condition mean min max ZT0-3 40.83826666666666 35.064949999999996 46.9899 ZT4-7 26.95525 26.95525 26.95525 ZT8-11 32.78015 32.78015 32.78015 ZT12-15 56.268674999999995 53.085899999999995 59.451449999999994 ZT16-19 48.617000000000004 48.617000000000004 48.617000000000004 ZT20-23 54.90005 54.90005 54.90005