(NOTE: The add-in has been revised to optionally provide asymptotic confidence interval.)
This add-in creates a pair of plots. The first plot is a scatter plot of the original data. The second plot is a scatter plot of χ versus λ with decision limits for chi. The chi-plot provides a visual assessment of the relationship between the two variables.
Note that the computation of the coordinates for the chi-plot can lead to missing values for χ.
See this reference for details: N. I. Fisher and P. Switzer (2001) Graphical Assessment of Dependence, The American Statistician, 55:3, 233-239.
Find this paper here: Graphical Assessment of Dependence: Is a Picture Worth a Thousand Tests?
