Question

Choose incorrect statement
А
Cov(x,y) = Cov(y,x)
B
Cov(x,x) = Var(x)
C
Cov(x, constant)=0
D
covariance is always positive​

Answer 1

Answer:

Choose incorrect statement

А

Cov(x,y) = Cov(y,x)

B

Cov(x,x) = Var(x)

C

Cov(x, constant)=0

D

covariance is always positive

answer is A

Answer 2

Answer:

Covariance is always positive