Monthly Archives: May 2014

Model selection by parameter estimate comparison …

I noticed two papers on astro ph in the past week attempting to perform hypothesis testing by comparing parameter estimates for subsamples of the data: the hypotheses in each case being that the subsamples do or do not share the same parent distribution.  The … Continue reading

Posted in Astronomy, Astrostatistics | Tagged | Leave a comment

Bayesian reanalysis of the quasar dataset …

Just received a notification that the conference proceedings concerning my Bayesian reanalysis of the quasar dataset (regarding the evidence, or lack thereof, for a dipole variation in the fine structure constant) has now been published in the Mem.S.A.It journal: here.  It’s … Continue reading

Posted in Astrostatistics, Gaussian Processes | Leave a comment

The gift that keeps on giving …

My loyal readers will perhaps remember the saga of the Pflamm-Altenburg et al. (2013) paper which I blogged about a while ago under the title, “Bordering on scientific misconduct …“.  The quick summary is that I noticed their paper in … Continue reading

Posted in Astronomy, Astrostatistics, Bad Science, Rants | 1 Comment

“Validation” of Bayesian posterior distributions …

Interesting paper by Harrison et al. on astro ph today under the title, “Validation of Bayesian posterior distributions using a multidimensional Kolmogorov-Smirnov test“.  The paper contains two proposed innovations: (1) use of the cumulative probability mass below a given likelihood … Continue reading

Posted in Astrostatistics, Order Statistics, Statistics | Leave a comment