condition mean min max ZT0-3 74.56089704499999 70.24771462 78.87407947 ZT4-7 57.21317275 53.91824647 60.50809903 ZT8-11 49.849919835 46.36167510666667 53.338164563333336 ZT12-15 53.99958553666667 47.73007075 60.26910032333333 ZT16-19 51.056377575 50.65044349666667 51.46231165333333 ZT20-23 53.30575874333333 51.914540269999996 54.69697721666667