and d\aY. In the simple case where Y)I < ^ 1, which would apply to an experiment on a visual star, it can be shown that S(d), the correlation as a function of df is proportional to the square of ...

Confidence ellipses can also serve as visual indicators of correlations. The confidence ellipse collapses diagonally as the correlation between two variables approaches 1 or -1. The confidence ellipse ...