condition mean min max ZT0-3 35.455083 35.455083 35.455083 ZT4-7 34.4884 34.4884 34.4884 ZT8-11 30.229378 30.229378 30.229378 ZT12-15 29.1682785 29.1682785 29.1682785 ZT16-19 29.6705945 29.6705945 29.6705945 ZT20-23 27.715746 27.715746 27.715746