condition mean min max ZT0-3 29.149012295 28.71509107 29.58293352 ZT4-7 31.565782093333333 30.170460706666667 32.96110348 ZT8-11 34.029392830000006 33.744356280000005 34.31442938 ZT12-15 31.712150686666668 29.557632913333332 33.86666846 ZT16-19 36.93128102166666 35.96111257333333 37.90144947 ZT20-23 37.213953785 36.4719052 37.95600237