This article is rated Stub-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Biography: Science and Academia Start‑class This article is within the scope of WikiProject Biography, a collaborative effort to create, develop and organize Wikipedia's articles about people. All interested editors are invited to join the project and contribute to the discussion. For instructions on how to use this banner, please refer to the documentation.BiographyWikipedia:WikiProject BiographyTemplate:WikiProject Biographybiography Start This article has been given a rating which conflicts with the project-independent quality rating in the banner shell. Please resolve this conflict if possible. This article is supported by the science and academia work group. Economics This article is within the scope of WikiProject Economics, a collaborative effort to improve the coverage of Economics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.EconomicsWikipedia:WikiProject EconomicsTemplate:WikiProject EconomicsEconomics ??? This article has not yet received a rating on the project's importance scale. Statistics Low‑importance This article is within the scope of WikiProject Statistics, a collaborative effort to improve the coverage of statistics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.StatisticsWikipedia:WikiProject StatisticsTemplate:WikiProject StatisticsStatistics Low This article has been rated as Low-importance on the importance scale.

Note: The first paragraph and a several sentences of this article are lifted verbatim from Kleiber and Kotz, Appendix A.2. Mathstat (talk) 14:34, 6 June 2012 (UTC)[reply]