In each case, say which correlation is higher, and explain briefly. (Data are from a longitudinal study of growth.)

(a) Height at age 4 and height at age 18, height at age 16 and height at age 18.

(b) Height at age 4 and height at age 18, weight at age 4 and weight at age 18.

(c) Height and weight at age 4, height and weight at age 18. PL968