condition mean min max ZT0-3 53.982592315000005 50.1166831 57.84850153000001 ZT4-7 41.254154665 36.796488935 45.711820395000004 ZT8-11 66.576112175 53.679131775 79.47309257500001 ZT12-15 46.23874273 34.138829820000005 58.33865564 ZT16-19 30.9950930575 30.409930795 31.58025532 ZT20-23 35.368653615 34.32530439 36.41200284