A response to a tweet forwarded to me. The person tweeting complained that FiveThirtyEight uses charts that don’t start the vertical axis at zero. The example given was this: In this post, I want to clear some confusion around the...

I’ve been an editor of JSS for the last few years, and as a result I tend to get email from people asking me about publishing papers describing R packages in JSS. So for all those wondering, here are some general comments. JSS prefers to publish papers about packages where the package is on CRAN and has been there long enough to have matured (i.e., obvious bugs ironed out and…

Recently, I introduced linear Gaussian basis function models as a suitable modelling technique for supervised learning problems that involve non-linear relationships between the target and the predictors. Recall that linear basis function models are generalizations of linear regression that regress the target on functions of the predictors, rather than the predictors themselves. In linear regression, […]

We are pleased to announce our guest speaker at Thursday’s seminar (April 24, 2014): “Statistics and Scientific Integrity”: S. Stanley Young, PhD Assistant Director for Bioinformatics National Institute of Statistical Sciences Research Triangle Park, NC Author of Resampling-Based Multiple Testing, Westfall and Young (1993) Wiley. The main readings for the discussion are: Young, S. & Karr, […]

-+*Suppose you’re drawing random samples uniformly from some interval. How likely are you to see a new value outside the range of values you’ve already seen? The problem is more interesting when the interval is unknown. You may be trying to estimate the end points of the interval by taking the max and min of […]

Someone wrote in: We are about to conduct a voting list experiment. We came across your comment recommending that each item be removed from the list. Would greatly appreciate it if you take a few minutes to spell out your recommendation in a little more detail. In particular: (a) Why are you “uneasy” about list […] The post Thinking of doing a list experiment? Here’s a list of reasons why…

Just one last short article about properties of the Hilbert matrix. I've already blogged about how to construct a Hilbert matrix in the SAS/IML language and how to compute a formula for the determinant. One reason that the Hilbert matrix is a famous (some would say infamous!) example in numerical […]

E. J. Wagenmakers writes: Remember I briefly talked to you about the subjective assessment of evidence? Together with Richard Morey and myself, Annelies Bartlema created a short questionnaire that can be done online. There are five scenarios and it does not take more than 5 minutes to complete. So far we have collected responses from […] The post A short questionnaire regarding the subjective assessment of evidence appeared first on…

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 […]

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…

One of the things that was hardest for me in graduate school was starting to think about my own research projects and not just the ideas my advisor fed me. I remember that it was stressful because I didn't quite … Continue reading →

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&#...

A link from the comments here took me to the wonderfully named Barfblog and a report by Don Schaffner on some reporting. First, the background: A university in England issued a press release saying that “Food picked up just a few seconds after being dropped is less likely to contain bacteria than if it is […] The post Ticket to Baaaaarf appeared first on Statistical Modeling, Causal Inference, and Social…

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…