Question

If bxy = 0.6; r = 0.75. S.D (X) = 3. Find S.D (Y)

Answer 1

Answer:

r(X,Y)=

Var(X)⋅Var(Y)

cov(X,Y)

⇒0.6=

Var(X)⋅25

27

⇒

Var(X)

=

0.6×5

27

∴Var(X)=81