= Selective Statistical and Mathematical Glossary = Barycentric Coordinates:: <> Brinley Plots:: Quantile-quantile plots, usually empirically obtained from data from two samples of the same size from a younger and an older population of subjects. The data in each group is ordered and the ''r''th smallest value in ''Sample,,1,,'' is plotted against the ''r''th smallest value in ''Sample,,2,,''. ''Additive'' and ''Multiplicative'' relationships can be read from the slope and/or intercept of these plots. Hartley Entropy:: For a probability distribution on a finite set of events this is the logarithm of the number events with positive probability. Part correlation:: Partial correlation:: Partial residuals:: <> ROC or Receiver Operating Characteristic:: This is a term derived from SignalDetectionTheory and relates the trade-off between Hits (or Correct Positives) and False Alarms (or False Positives) when using a decision criterion based on the value of a measure. Triangular Coordinates:: ---- [[CbuStatistics|Return to Statistics main page]] [[http://www.mrc-cbu.cam.ac.uk/|Return to CBU main page]] These pages are maintained by [[mailto:ian.nimmo-smith@mrc-cbu.cam.ac.uk|Ian Nimmo-Smith]] and [[mailto:peter.watson@mrc-cbu.cam.ac.uk|Peter Watson]] ~-[Last updated on 20 October, 2005]-~