can there be zero covariance greg tyler example of zero covariance can a random variable be dependent but have zero covariance? how random variable could have zero covariance which random variable has zero covariance? how can variables be dependent and zero covariance can a random variable be dependent but has zero covariance what is the difference between dependent and covariance can random variables be dependent can you explain zero covariance which of the following can be an example of zero covariance? how can there be zero covariance can you explain zero covariance how is zero covariance and dependence what kind of variables are dependent how is the inverse a dependent variable how random variables can be dependent but have zero covariance when there is zero covariance what type of variable how do random variables have zero covariance why are there covariance and dependence in psychology