format
A list providing a summary of the data. The list contains:
lcl{
hiv$means : the mean vector,
hiv$stddev : the vector of standard deviations,
hiv$corr : the correlation matrix, and
hiv$n : the sample size.
}source
Roverato, A. & Whittaker, J. (1996) A hyper normal prior distribution
for approximate Bayes factor calculations on non-decomposable
graphical Gaussian models, unpublished manuscript.