condition mean min max ZT0-3 4.5800125 4.493535 4.66649 ZT4-7 2.45672 2.45672 2.45672 ZT8-11 1.72263 1.72263 1.72263 ZT12-15 0 0 0 ZT16-19 3.088405 3.088405 3.088405 ZT20-23 3.3631599999999997 3.3631599999999997 3.3631599999999997