Doing legwork, doing justice

April 15, 2013
By
Doing legwork, doing justice

The New York Times brought attention to the Bronx courtrooms this weekend. (link) The following small-multiples chart effectively illustrates how the Bronx system is uniquely unproductive, compared to the other boroughs: The above chart shows the outcomes. The next chart...

Read more »

The role of statistics in the top public health achievements of the 20th century

April 15, 2013
By
The role of statistics in the top public health achievements of the 20th century

In this International Year of Statistics, I'd like to describe the major role of statistics in public health advances. In our modern society, it is sometimes difficult to recall the huge advances in health and medicine in the 20th century. To name a few: penicillin was discovered in 1928, risk [...]

Read more »

Stock-picking opportunity and the ratio of variabilities

April 15, 2013
By
Stock-picking opportunity and the ratio of variabilities

How good is the current opportunity to pick stocks relative to the past? Idea The more stocks act differently from each other relative to how volatile they are, the more opportunity there is to benefit by selecting stocks.  This post looks at a particular way of investigating that idea. Data Daily (log) returns of 442 … Continue reading →

Read more »

Simulating the Gambler’s Ruin

April 15, 2013
By
Simulating the Gambler’s Ruin

The gambler’s ruin problem is one where a player has a probability p of winning  and probability q of losing. For example let’s take a skill game where the player x can beat player y with probability 0.6 by getting closer to a target. The game play begins with player x being allotted 5 points and player y [...]

Read more »

Checking the Goodness of Fit of the Poisson Distribution in R for Alpha Decay by Americium-241

Checking the Goodness of Fit of the Poisson Distribution in R for Alpha Decay by Americium-241

Introduction Today, I will discuss the alpha decay of americium-241 and use R to model the number of emissions from a real data set with the Poisson distribution.  I was especially intrigued in learning about the use of Am-241 in smoke detectors, and I will elaborate on this clever application.  I will then use the Pearson chi-squared […]

Read more »

Good, Bad and Wrong: Videos about Confidence Intervals

April 14, 2013
By
Good, Bad and Wrong: Videos about Confidence Intervals

Videos are useful teaching and learning resources There is much talk about “flipped classrooms” and the wonders of Khan Academy, YouTube abounds with videos about everything…really! Even television news reports show YouTube clips. Teachers and instructors use videos in their … Continue reading →

Read more »

BayesComp homepage

April 14, 2013
By
BayesComp homepage

Today, the BayesComp section of ISBA launched its website. It is organised as a wiki and members of the section are strongly incited to take part into the construction of the website. To quote from Peter Green’s introduction: This new Wikidot site aims to be a community-edited resource on all aspects of Bayesian computation, available […]

Read more »

Detecting predictability in complex ecosystems

April 14, 2013
By

A couple people pointed me to a recent article, “Detecting Causality in Complex Ecosystems,” by fisheries researchers George Sugihara, Robert May, Hao Ye, Chih-hao Hsieh, Ethan Deyle, Michael Fogarty, and Stephan Munch. I don’t know anything about ecology research but I could imagine this method being useful in that field. I can’t see the approach [...]The post Detecting predictability in complex ecosystems appeared first on Statistical Modeling, Causal Inference, and…

Read more »

Does statistics have an ontology? Does it need one? (draft 2)

April 14, 2013
By
Does statistics have an ontology? Does it need one? (draft 2)

Chance, rational beliefs, decision, uncertainty, probability, error probabilities, truth, random sampling, resampling, opinion, expectations. These are some of the concepts we bandy about by giving various interpretations to mathematical statistics, to statistical theory, and to probabilistic models. But are they real? The question of “ontology” asks about such things, and given the “Ontology and Methodology” […]

Read more »

Sunday data/statistics link roundup (4/14/2013)

April 14, 2013
By

The most influential data scientists on Twitter, featuring Amy Heineike, Hilary Mason, and a few other familiar names to readers of this blog. In other news, I love reading list of the “Top K _____” as much as the next … Continue reading →

Read more »

Why girls do better in school

April 14, 2013
By

Wayne Folta writes, “In light of your recent blog post on women in higher education, here’s one I just read about on a techie website regarding elementary education”: Why do girls get better grades in elementary school than boys—even when they perform worse on standardized tests? New research . . . suggests that it’s because [...]The post Why girls do better in school appeared first on Statistical Modeling, Causal Inference,…

Read more »

Continuing Sync

April 14, 2013
By
Continuing Sync

I am continuing in Sync: How Order Emerges from Chaos in the Universe, Nature, and Daily Lifeby Steven Strogatz. To get a feeling on it, I was building a group of things which have only a minute influence on each other are able to synchronize thei...

Read more »

Percent unemployed in best cities of 2012

April 13, 2013
By
Percent unemployed in best cities of 2012

Data from Bloomberg Businessweek's slideshow. Please click the image below to interact with it.

Read more »

Percentage with Graduate Degree in Best Cities of 2012

April 13, 2013
By
Percentage with Graduate Degree in Best Cities of 2012

Data from Bloomberg Businessweek's slideshow. Please click image to interact with it.

Read more »

Number of Colleges in best cities of 2012

April 13, 2013
By
Number of Colleges in best cities of 2012

Data from Bloomberg Businessweek's slideshow. Please click image to interact with it.

Read more »

Number of Bars (yes, for drinking) in the best cities of 2012

April 13, 2013
By
Number of Bars (yes, for drinking) in the best cities of 2012

Data from Bloomberg Businessweek's slideshow. Please click on the image to interact with it.

Read more »

Population in best cities of 2012

April 13, 2013
By
Population in best cities of 2012

Data from Bloomberg Businessweek's slideshow. Please click on the image to interact with it.

Read more »

Characteristics of best cities of 2012

April 13, 2013
By
Characteristics of best cities of 2012

Data from Bloomberg Businessweek's slideshow. Please click the image below to interact with it.

Read more »

Motivating Students

April 13, 2013
By
Motivating Students

Figure shown to students in a particular class to show the effect of slacking after the mid-semester grades are received.Background information: A course has multiple components - Exams, projects, quizzes, assignments, etc. The objective of this set of...

Read more »

Data Analysis Course

April 13, 2013
By
Data Analysis Course

Although my initial motive for signing up for the Coursera MOOC titled "Data Analysis" in Jan 2013 was to get a sense of how MOOCs work and how quickly they might make my day job extinct, I must admit I feel safer with my job likely to continue to exis...

Read more »

Bayesian robust heteroscedastic hierarchical two-factor "ANOVA"

April 13, 2013
By
Bayesian robust heteroscedastic hierarchical two-factor "ANOVA"

A great advantage of Bayesian analysis, in software such as JAGS/BUGS, is that you can create models that are appropriate to the data (instead of shoe-horning your data into inappropriate models). For example, suppose you have a design that would be an...

Read more »

Bono – the Factivist on Statistics and Open Data

April 13, 2013
By

(This article was originally published at Access to Statistics, and syndicated at StatsBlogs.) Please comment on the article here: Access to Statistics

Read more »

Can you write a program to determine the causal order?

April 13, 2013
By

Mike Zyphur writes: Kaggle.com has launched a competition to determine what’s an effect and what’s a cause. They’ve got correlated variables, they’re deprived of context, and you’re asked to determine the causal order. $5,000 prizes. I followed the link and the example they gave didn’t make much sense to me (the two variables were temperature [...]The post Can you write a program to determine the causal order? appeared first on…

Read more »


Subscribe

Email:

  Subscribe