We are interested in the product moments of the two
sample variances ( 2
1 S , 2
2 S ) and sample correlation
coefficient (R) of the bivariate normal distribution, so we
want to derive ( 2 2 )
1 2
a b c E S S R for finite a, b, c. One
approach to obtain the product moments of the two
sample variances and the correlation coefficient was
discussed by Joarder (2006), however his results
involves an infinite series that does not consider an
important term, without the missing term, the result of
Joarder (2006) does not work to get some product
moments, for instance, we are not able to get the first
moment of R. Here we expand the result of Joarder
(2006) to derive a more general result.