# Statistics

Statistics Blogs

## Applied Statistics Lesson of the Day – Notation for Fractional Factorial Designs

$Applied Statistics Lesson of the Day – Notation for Fractional Factorial Designs$

Fractional factorial designs use the notation; unfortunately, this notation is not clearly explained in most textbooks or web sites about experimental design.  I hope that my explanation below is useful. is the number of levels in each factor; note that the notation assumes that all factors have the same number of levels. If a factor has […]

## When less is more

April 23, 2014
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Recently the Center for Medicaid and Medicare Services (CMS) released provider utilization and payment data. This is part of the government's ongoing push for transparency into medical services and costs. You may remember that last year they released hospital specific Medicare data. This time the data is practioner specific. This large dataset (over 9 million records) has a wealth of great information if you're interested in how much doctors charge…

## What is meant by regression modeling?

April 22, 2014
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What is meant by regression modeling? Linear Regression is one of the most common statistical modeling techniques. It is very powerful, important, and (at first glance) easy to teach. However, because it is such a broad topic it can be a minefield for teaching and discussion. It is common for angry experts to accuse writers […] Related posts: How robust is logistic regression? Modeling Trick: Masked Variables Modeling Trick: the…

## A helpful structure for analysing graphs

April 22, 2014
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Mathematicians teaching English “I became a maths teacher so I wouldn’t have to mark essays” “I’m having trouble getting the students to write down their own ideas” “When I give them templates I feel as if it’s spoon-feeding them” These … Continue reading →

## Drexel on Monday 4/28

April 22, 2014
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Looks interesting if you're in the area.  I plan to be at the lunch.From: Drexel University's LeBow College of Business <announce@lebow.drexel.edu>Date: Thu, Apr 17, 2014 at 11:14 AMSubject: School of Economics Presents: 2 Presentations by D...

## Examen, Séries Chronologiques

April 22, 2014
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Après les exposés des dernières séances, l’examen du cours MAT8181, Séries Chronologiques avait lieu ce matin (et devrait finir dans quelques minutes, avec un peu de temps supplémentaire pour certain, compte tenu de la panne de métro qu&#...

## Stata-Bloggers revamped

April 22, 2014
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STATA-Bloggers has been out for a year and has gotten a bit of a facelift.  Still far fewer bloggers (9) than would be ideal to maintain an aggregator, but probably the best source for an aggregate feed on Stata news.  Please contact me if yo...

## Seven forecasting blogs

April 22, 2014
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There are several other blogs on forecasting that readers might be interested in. Here are seven worth following: No Hesitations by Francis Diebold (Professor of Economics, University of Pennsylvania). Diebold needs no introduction to forecasters. He primarily covers forecasting in economics and finance, but also xkcd cartoons, graphics, research issues, etc. Econometrics Beat by Dave Giles. Dave is a professor of economics at the University of Victoria (Canada), formerly from my own…

## More On the Limitations of the Jarque-Bera Test

April 21, 2014
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Testing the validity of the assumption, that the errors in a regression model are normally distributed, is a standard pastime in econometrics. We use this assumption when we construct standard confidence intervals  for, or test hypotheses about, t...

## Ray Fair’s Model(s) in EViews

April 21, 2014
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Here's a follow-up to my recent post about the Federal Reserve U.S. macroeconometric model being freely available in EViews formatRay Fair's well-known model for the U.S. economy is also now available in a form that's ready to play with in EViews....