Archive for statue
feu rouge
Posted in pictures with tags 1962, cross-words, Czechoslovakia, destalinisation, France Inter, French, mots-croisés, Prague, pun, Stalin, statue on February 8, 2020 by xi'an
same data – different models – different answers
Posted in Books, Kids, Statistics, University life with tags Beaumont-en-Auge, Jeffreys priors, Laplace succession rule, non-informative priors, Normandie, Pierre Simon de Laplace, reference priors, statue, The Bayesian Choice, wikipedia on June 1, 2016 by xi'an
An interesting question from a reader of the Bayesian Choice came out on X validated last week. It was about Laplace’s succession rule, which I found somewhat over-used, but it was nonetheless interesting because the question was about the discrepancy of the “non-informative” answers derived from two models applied to the data: an Hypergeometric distribution in the Bayesian Choice and a Binomial on Wikipedia. The originator of the question had trouble with the difference between those two “non-informative” answers as she or he believed that there was a single non-informative principle that should lead to a unique answer. This does not hold, even when following a reference prior principle like Jeffreys’ invariant rule or Jaynes’ maximum entropy tenets. For instance, the Jeffreys priors associated with a Binomial and a Negative Binomial distributions differ. And even less when considering that there is no unity in reaching those reference priors. (Not even mentioning the issue of the reference dominating measure for the definition of the entropy.) This led to an informative debate, which is the point of X validated.
On a completely unrelated topic, the survey ship looking for the black boxes of the crashed EgyptAir plane is called the Laplace.
Valencia snapshot [#2]
Posted in Kids, pictures, Running, Travel with tags Spain, statue, sunrise, trail running, València on June 5, 2015 by xi'an
snapshot from Salem
Posted in Kids, pictures, Travel with tags Halloween, Massachusset, Roger Conant, Salem, statue, USA, vacations, witchery on October 31, 2014 by xi'an
