When both interval Y variables and interval X variables are selected, scatter plots are displayed as a rectangular matrix with Y variables as the row variables and X variables as the column variables.

We model a covariance matrix in terms of its corresponding standard deviations and correlation matrix. We discuss two general modeling situations where this approach is useful: shrinkage estimation of ...

A correlation matrix between three variables has to satisfy certain conditions. Such a matrix essentially contains three numbers and thus can be represented by a point in three dimensions. The set of ...