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So You Think You Have a Power Law — Well Isn't That Special
So You Think You Have a Power Law — Well Isn't That Special?So you’ve got your AdWords test all set up: Will people go for the headline “Code Review Tools” or “Tools for Code Review?” Gee they’re both so exciting!
Easy statistics for AdWords A/B testing, and hamsters
Nassim Nicholas Taleb Home and Professiona
Why Short Term Fat Tails Means Long Term Fat Tails (debunking illusions of "central limit theorem"; a (technical) reply to Treynor's "What can Taleb Learn From Markowitz?")
Abstract We introduce a new variable selection technique called the Permuted Inclusion Criterion (PIC) based on augmenting the predictor space X with a row-permuted version denoted Xpi. We adopt the linear regression setup with n observations on p variables.
ScholarlyCommons - Shaun Lysen: Permuted Inclusion Criterion: A
Is the current economic slump worse than the recession of the early 1980s? Measured by unemployment, the answer appears to be no, or at least not yet. The jobless rate was 10.2% in October, compared with a peak of 10.8% in November and December of 1982. But viewed another way, the current recession looks worse, not better. The unemployment rate among college graduates is higher than during the 1980s recession.
Good Data and Flawed Conclusions - WSJ.com
Jonathan Baron's R help page
R/S function finder R at gmane.org: R-announce ; Bayesian networks ; Debian ; Developers ; R-help ; Geography ; Graphical models ; GUI ; Mac ; Finance .
I’ll copy and paste my notes for some of the talks at Wikimania 2007 here, in case it’s helpful so that everyone can follow what’s going on. As such they will be in point / summary form, rather than well-formed prose: Talk:”Where have all the editors gone?”
Blog - Nick Jenkins » Blog Archive » Wikimania Talk notes: “Wher
http://norvig.com/experiment-design.html
When an experimental study states "The group with treatment X had significantly less disease ( p = 1%)", many people interpret this statement as being equivalent to "there is a 99% chance that if I do treatment X it will prevent disease."
It being the season for job-interview talks, student exam presentations, etc., the problems novices have with giving them are much on my mind. And since I find myself composing the same e-mail of advice over and over, why not write it out once and for all? Once you understand the purpose of academic talks, it becomes clear that the two fundamental obstacles to giving good talks are memory and fear.
Three-Toed Sloth
WikiXRay - Meta
The main goal of this project is to develop a robust and extensible software tool for an in-depth quantitative analysis of the whole Wikipedia project.
Mediation (David A. Kenny)
Consider a variable X that is assumed to affect another variable Y. The variable X is called the initial variable and the variable that it causes or Y is called the outcome . In diagrammatic form, the unmediated model isDecember 31, 2006 | Tags: digg , diggstatus , statistics , data , analysis The Experiment Saturday, December 9th, I decided to run an experiment.
Brian.Shaler.name | Blog
Margin of Error and Confidence Levels Made Simple
Most surveys draw their conclusions from a sampling a larger group. How well the sample represents the larger population is gauged by two important statistics which quality professionals should understand – the margin of error and confidence level. By Pam Hunter A survey is a valuable assessment tool in which a sample is selected and information from the sample can then be generalized to a larger population.Subjective judgments, an essential information source for science and policy, are problematic because there are no public criteria for assessing judgmental truthfulness. I present a scoring method for eliciting truthful subjective data in situations where objective truth is unknowable. The method assigns high scores not to the most common answers but to the answers that are more common than collectively predicted, with predictions drawn from the same population.
A Bayesian Truth Serum for Subjective Data -- Prelec 306 (5695):
Classroom Notes; Computing Corner; Curriculum Matters; Data Bank; Practical Activities; Historical Perspective; Book Reviews; Letters; News and Notes. Teaching Statistics seeks to help teachers of biology, business studies, economics, geography, mathematics, the sciences and the social sciences etc. by showing how statistical ideas can illuminate their work and how to make proper use of statistics in their teaching. It is also directed towards those who teach statistics as a separate subject and to those who teach statistics in conjunction with mathematics courses. In the USA, teachers will find it useful in teaching the data-handling aspects of the NCTM Standards.The emphasis of the articles is on teaching and the classroom. If you would like to stay informed about new articles in Teaching Statistics, sign up to receive email table of contents alerts via Wiley Online Library.