condition mean min max ZT0-3 51.0165337675 47.029446555 55.00362098 ZT4-7 30.73442397 27.604145175 33.864702765000004 ZT8-11 40.8076955475 31.665947685 49.94944341 ZT12-15 64.8607613275 54.56380177 75.157720885 ZT16-19 64.472461175 58.89072723 70.05419512 ZT20-23 45.404304045 44.082615235000006 46.725992855