R has 108 shades of grey with an 'e', and 116 shades of gray with an 'a'. Fully 34% of named colors are gray/grey of some kind. So when can we expect R, the movie? # Blog appendix > temp = colors() > length(temp) #657 [1] 657 > > temp2 ...

R has 108 shades of grey with an 'e', and 116 shades of gray with an 'a'. Fully 34% of named colors are gray/grey of some kind. So when can we expect R, the movie? # Blog appendix > temp = colors() > length(temp) #657 [1] 657 > > temp2 ...

Date: February 3, 2015 at 12:55:59 PM EST Subject: Sample Stats Question From: ** Hello, I hope all is well and trust that you are having a great day so far. I hate to bother you but I have a stats question that I need help with: How can you tell which group has the […] The post Perhaps the most contextless email I’ve ever received appeared first on Statistical…

Xian blogged recently on the incoming RSS read paper: Statistical Modelling of Citation Exchange Between Statistics Journals, by Cristiano Varin, Manuela Cattelan and David Firth. Following the last JRSS B read paper by one of us! The data that are used in the paper (and can be downloaded here) are quite fascinating for us, academics fascinated by academic rankings, […]

A Statistical Model as a Chance Mechanism Aris Spanos Today is the birthday of Jerzy Neyman (April 16, 1894 – August 5, 1981). Neyman was a Polish/American statistician[i] who spent most of his professional career at the University of California, Berkeley. Neyman is best known in statistics for his pioneering contributions in framing the Neyman-Pearson (N-P) […]

In this post, I would like to share a simple problem about sampling analysis. And I will demonstrate how to solve this using Python and R. The first two problems are originally from Sampling: Design and Analysis book by Sharon Lohr.ProblemsLet $N=6$ an...

To continue from today’s class, here’s what we’ll be discussing next time: – Estimating the direction and the magnitude of the discrimination parameters. – How to tell when your data don’t fit the model. – When does ideal-point modeling make a difference? Comparing ideal-point estimates to simple averages of survey responses. P.S. Unlike the previous […] The post Item-response and ideal point models appeared first on Statistical Modeling, Causal Inference,…

Fernanda Viégas and Martin Wattenberg have written a wonderful piece titled Design and Redesign in Data Visualization about criticism in data visualization. They thoughtfully analyze the practice and point out some of the issues when people create redesigns, including intellectual honesty and perfect hindsight. They then go on to define some “rules of engagement” for a more … Continue reading Link: Design and Redesign in Data Visualization

I wanted to add some context to what we talked about in class today. Part of the message I was sending was that there are some stupid things that get published and you should be careful about that: don’t necessarily believe something, just cos it’s statistically significant and published in a top journal. And, sure, […] The post A message I just sent to my class appeared first on Statistical…

Last week I was chatting with some mathematicians and I mentioned the blog post that I wrote last year on the distribution of Pythagorean triples. In my previous article, I showed that there is an algorithm that uses matrix multiplication to generate every primitive Pythagorean triple by starting with the […]

In the last issue of Statistical Science, David Belhouse [author of De Moivre’s biography] and Nicolas Fillion published an accounting of a discussion between Pierre Rémond de Montmort, Nicolaus Bernoulli—”the” Bernoulli associated with the St. Petersburg paradox—, and Francis Waldegrave, about the card game of Le Her (or Hère, for wretch). Here is the abridged […]

I was asked to comment on a forthcoming article, “Statistical Modeling of Citation Exchange Among Statistics Journals,” by Christiano Varin, Manuela Cattelan and David Firth. Here’s what I wrote: For better or for worse, academics are fascinated by academic rankings, perhaps because most of us reached our present positions through a series of tournaments, starting […] The post “For better or for worse, academics are fascinated by academic rankings .…

Start Spreading the News….. The Philosophy of Statistics: Bayesianism, Frequentism and the Nature of Inference, 2015 APS Annual Convention Saturday, May 23 2:00 PM- 3:50 PM in Wilder (Marriott Marquis 1535 B’way) Andrew Gelman Professor of Statistics & Political Science Columbia University Stephen Senn Head of Competence Center for Methodology and Statistics (CCMS) […]

This paper by Alon Drory was arXived last week when I was at Columbia. It reassesses Jaynes’ resolution of Bertrand’s paradox, which finds three different probabilities for a given geometric event depending on the underlying σ-algebra (or definition of randomness!). Both Poincaré and Jaynes argued against Bertrand that there was only one acceptable solution under […]

The latest commentary on the rising cost of college tuition is by Paul F. Campos and is titled The Real Reason College Tuition Costs So Much. There has been much debate about this article and whether Campos is right or wrong...and I don't plan to add to that. However, I wanted to pick up on