
Archives
 August 2017
 July 2017
 June 2017
 May 2017
 April 2017
 March 2017
 February 2017
 January 2017
 December 2016
 November 2016
 October 2016
 September 2016
 August 2016
 July 2016
 June 2016
 May 2016
 April 2016
 March 2016
 February 2016
 January 2016
 December 2015
 November 2015
 October 2015
 September 2015
 August 2015
 July 2015
 June 2015
 May 2015
 April 2015
 March 2015
 February 2015
 January 2015
 December 2014
 November 2014
 October 2014
 September 2014
 August 2014
 July 2014
 June 2014
 May 2014
 April 2014
 March 2014
 February 2014
 January 2014
 December 2013
 November 2013
 October 2013
 September 2013
 June 2013
 May 2013
 April 2013
 March 2013
 February 2013
 January 2013
 December 2012
 November 2012
 October 2012
 September 2012
 August 2012
 July 2012
 May 2012
 March 2012
 February 2012
 January 2012
 December 2011
 November 2011
 October 2011

Meta
Category Archives: statistics
An Expected Value Connection Between Order Statistics from a Discrete and a Continuous Distribution
Years ago, in the course of doing some research on another topic, I ran across the following result relating the expected values of the order statistics from a discrete and a continuous distribution. I found it rather surprising. Theorem: Fix n, and … Continue reading
Posted in order statistics, probability, statistics
Leave a comment
Operations Research Makes List of Top 5 STEM Professions Employing Women
My February 2016 issue of ORMS Today says that “operations research analyst” is the STEM (Science, Technology, Engineering, and Mathematics) profession with the thirdhighest percentage of women. The percentage of OR analysts who are women is 55.4%. I’m glad to see … Continue reading
Posted in gender, operations research, optimization, statistics
Leave a comment
Independence of the Range and Minimum of a Sample from an Exponential Distribution
A few years ago I answered a question on math.SE about the distribution of the sample range from an exponential (1) distribution. In my answer I claim that the range and the minimum of the sample are independent, thanks to the … Continue reading
Posted in probability, statistics
Leave a comment
Picking Random Points on a Circle (Not a Disk)
How do you select points at random on a circle? By “circle” I mean the outside of a disk, not its interior. In this post I’m going to discuss two methods: (1) Selecting an angle at random on and taking … Continue reading
Posted in probability, simulation, statistics
2 Comments
A Math Error in the New Yorker
I normally use this blog to talk about mathematical questions that interest me. However, I saw a math error in the New Yorker yesterday that I think is worth commenting on. James Surowiecki has an article (The Mobility Myth) arguing that … Continue reading
Posted in journalism, statistics
2 Comments
Tail Bounds of the Normal Distribution
The question of bounding the tails of the normal distribution has popped up a couple of times on math.SE lately. This is an easytoprove but useful result, and so it’s worth talking about. The standard normal probability density function is … Continue reading
Posted in probability, statistics
5 Comments