Here is the question: You are given the following for a sample of five observations from a bivariate distribution:
x y
1 4
2 2
4 3
5 6
6 4
$\bar{x}= 3.6$, $\bar{y} = 3.8$
A is the covariance of the empirical distribution F(underscore e) as defined by these five observations.
B is the maximum possible covariance of an empirical distribution with identical marginal distributions to $F_e$.
Determine $B - A$.
What does the line on top of a variable mean?