How to calculate covariace of two random variable

Dear User

I have two random numbers for example:

X: mean=0.05 & Standard deviation=0.005

Y: mean=0.0455 & Standard deviation=0.005

How do I calculate Covariance(X,Y)?

Regards

Answer 1

[Matt J]

cov(x(:),y(:))

[Mohsen]

Thank you

But I only have mean and std. of the distributions, the vector of numbers is not available?

[Matt J]

The covariance cannot be derived from mean and std.