when is the correlation coefficient calculated on r what is the correlation in r/ what is the correlation matrix in math why is the matrix in r a random variable why do we use the multivariate t distribution in r? when can a correlation coefficient be calculated in t distribution in r? what is the matrix of the multivariate t distribution which variable in the multivariate t distribution can be determined as a random variable in a sigma sample? when to calculate correlation matrix why does the correlation coefficient have to be multiplied by df when is the correlation coefficient defined? how does t distribution generate random variables what is the matrix for the multivariate t distribution in r when the coefficient of correlation is greater than when to use sigma in r when is a correlation matrix defined when to calculate coefficient on mtd what is the correlation matrix of the multivariate t-distribution? why a correlation matrix is defined when df>2 what is multivariate t distribution