condition mean min max ZT0-3 125.468732 125.468732 125.468732 ZT4-7 81.283833 81.283833 81.283833 ZT8-11 44.965402499999996 44.965402499999996 44.965402499999996 ZT12-15 54.168852 54.168852 54.168852 ZT16-19 38.866694499999994 38.866694499999994 38.866694499999994 ZT20-23 27.268304 27.268304 27.268304