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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?

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    My pleasure. $\,$2012-12-11

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