Following are the heights of a random sample of 12 fathers (X) and the corresponding heights of their eldest sons (Y) in inches. X: 65, 63, 67, 64, 68, 62, 70, 66, 68, 67, 69, 71 Y: 68, 66, 68, 65,...

Extracted text: Following are the heights of a random sample of 12 fathers (X) and the corresponding heights of their eldest sons (Y) in inches. X: 65, 63, 67, 64, 68, 62, 70, 66, 68, 67, 69, 71 Y: 68, 66, 68, 65, 69, 66, 68, 65, 71, 67, 68, 70 Which group has the less variable heights based on the coefficient of variation? Answer X or Y. Report the corresponding CV (in %) in 2 decimal places beside your first answer, separated by a comma.