condition mean min max ZT0-3 17.0853844575 16.429149565 17.74161935 ZT4-7 15.3146345775 12.002797619999999 18.626471535 ZT8-11 25.187773040000003 21.47706115 28.898484930000002 ZT12-15 25.890232140000002 25.585259845 26.195204435 ZT16-19 23.5542469875 21.915200040000002 25.193293935 ZT20-23 28.550305780000002 26.139311415 30.961300145