Tuesday, October 18, 2011

Your genetic profile

Craig Venter said, in response to a question about the 'risks' of knowing one's genetic makeup:

"Understanding the genetic code is understanding probabilities.  There is very little in your code that is yes/no."

Monday, October 17, 2011

Hazards of Having Good Students in your Introductory Statistics Class

This paper "Hazards of Having Good Students in your Introductory Statistics Class" by Trivellore Raghunathan about the meaning of confidence intervals and p-values is well-written and entertaining.

The meaning of p-values

Regarding p-values, Paul Meehl said something along the lines of "a p-value answers a question we shouldn't ask about a topic we aren't interested in".

THINK

"I've often said that once scientists get a p-value less than 0.05 or a confidence interval that implies statistical significance, they turn their brains off."  Steve Simon, quoted from here.

Monday, September 12, 2011

Significance

This cartoon from XKCD is wonderful:


"Any claim coming from an observational study is most likely to be wrong"

This article from the journal "Significance"

Deming, data and observational studies
Author: S. Stanley Young, Alan Karr
Published: Aug 25, 2011 - From issue: Volume 8 Issue 3 (September 2011)
Doi: 10.1111/j.1740-9713.2011.00506.x

suggests a process control-based solution for improving the success rate of observational studies.

To better appreciate the problem of multiple testing, they suggest visiting Jery Dallal's simulation web page, which illustrates what happens when one carries out "100 Independent 0.05 Level Tests For An Effect Where None Is Present".

Thursday, September 8, 2011

Forensic bioinformatics

I like this phrase, "Forensic bioinformatics", that Keith Baggerly and Kevin Coombes have defined:

"Data processing, however, is often not described well enough to allow for exact reproduction of the results, leading to exercises in “forensic bioinformatics” where aspects of raw data and reported results are used to infer what methods must have been employed."

in this paper here

Computing for Statistical Genetics: nice R slides

Thomas Lumley and Ken Rice have made a very nice set of "Computing for Statistical Genetics" slides on R that they prepared for the European Institute in Statistical Genetics.  This set of slides is available here

Thursday, August 18, 2011

Elegant plotting of GWAs results

I really like the way they plotted their GWAs results in this paper:

International Multiple Sclerosis Genetics Consortium; Wellcome Trust Case
Control Consortium. Genetic risk and a primary role for cell-mediated immune mechanisms in multiple sclerosis. Nature. 2011 Aug 10;476(7359):214-9. doi: 10.1038/nature10251. PubMed PMID: 21833088.


Try out their elegant interactive version of their GWAs Figure at:

http://wattle.well.ox.ac.uk/wtccc2/external/ms/

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