Archive for the ‘Fragments’ Category

Should the default significance level be changed from 0.05 to 0.005?

1 July 2018 Comments off

My comments in this discussion of “Redefine statistical significance”:

The call for smaller significance levels cannot be based only on mathematical arguments that p values tend to be much lower than posterior probabilities, as Andrew Gelman and Christian Robert pointed out in their comment (“Revised evidence for statistical standards”).

In the rejoinder, Valen Johnson made it clear that the call is also based on empirical findings of non-reproducible research results. How many of those findings are significant at the 0.005 level? Should meta-analysis have a less stringent standard?

“Irreplicable results can’t possibly add empirical clout to the mathematical argument unless it is already known or assumed to be caused by a given cut-off, and further, that lowering it would diminish those problems.”

The preprint cites empirical results to support its use of the 1:10 prior odds. If that is in fact a reliable estimate of the prior odds for the reference class of previous studies, then, in the absence of other relevant information, it would be reasonable to use as input for Bayes’s theorem.

John Byrd asks, “Is 1:10 replicable?” Is it important to ask whether a 1:1 prior odds can be rejected at the 0.005 significance level?


The Fiducialist Papers: Evidence and Likelihood

1 April 2018 Comments off

“The Fiducialist Papers” was just added to the name of the Evidence and Likelihood website.

Categories: Fragments

What’s the goal of statistics in scientific applications?

1 October 2017 Comments off

the goal [of statistical inference in science] is not to infer highly probable claims (in the formal sense)* but claims which have been highly probed and have passed severe probes

Source: Deborah G. Mayo’s Performance or Probativeness? E.S. Pearson’s Statistical Philosophy | Error Statistics Philosophy

Categories: Fragments

“a list of possibly predatory publishers” based on Beall’s List

1 September 2017 Comments off

This is a list of possibly predatory publishers. The kernel for this list was extracted from the archive of Beall’s List at It will be updated as new information or suggested edits are submitted or found by the maintainers of this site.

Source: List of Predatory Publishers | Stop Predatory Journals (accessed 24 August 2017)

Categories: Fragments

“Can You Change Your Bayesian Prior?”

1 July 2017 Comments off
DGM: “Is it legitimate to change one’s prior based on the data?”
Sometimes. A subjective Bayesian encountering completely unexpected data changes the prior:
In the philosophy literature, that has been compared to changing the premises of a deductive argument. It has been argued that just as one may revise a premise without abandoning deductive logic as a tool, one may revise a prior without abandoning Bayesian updating as a tool.
Categories: Fragments, model checking

SSC 2017 talk on the misleading nature of false discovery rates

13 June 2017 Comments off
Categories: Fragments

About the Statomics Lab

2 April 2017 Comments off

The Complexity and Statistics Research Lab was called “The Statomics Lab” until 4 February 2017. The word statomics abbreviates statistical inference and computation in genomics. David Bickel launched the lab in June of 2007 at the Ottawa Institute of Systems Biology.

Categories: Fragments