condition mean min max ZT0-3 3.6961299999999997 3.6961299999999997 3.6961299999999997 ZT4-7 3.9007449999999997 3.9007449999999997 3.9007449999999997 ZT8-11 1.48552 1.48552 1.48552 ZT12-15 2.8330800000000003 2.8330800000000003 2.8330800000000003 ZT16-19 5.47208 5.47208 5.47208 ZT20-23 3.7248149999999995 3.7248149999999995 3.7248149999999995