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Arquivo da tag: statistics
Sentences to Ponder
Ptolemy had (…) a universal approximator. He just didn’t know it. With enough epicycles and cycles, one could approximate any orbital system as closely as one wanted. In essence, the mistake (but he couldn’t have known it) was to try … Continuar lendo
Publicado em english, estatística
Marcado com Andrew Gelman, english, insight, neural nets, noise, Ptolomey, science, signal, statistics, stats, theory
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Hume, Kant, Causality in Statistics and the no-free-lunch theorems
Note: In what follows, I take some notes on some thoughts about how learning is possible. My notes try to connect Hume, Kant and Nietzsche with statistics (Bayesian inference and causal models) and computer science (machine learning results like the … Continuar lendo
Publicado em ciência, english, estatística, orquídeas selvagens
Marcado com Bayes, Bayes theorem, bleen, causal model, causality, grue ridle, Hume Kant, learning, machine learning, Neyman-Rubin, Nietzsche, no-free-lunch theorem, Pearl, philosofy, statistics
2 Comentários
On the Likelihood Principle
Deborah Mayo presented a new version of her critique of the Strong Likelihood Principle. And since a few friends have asked me about what is the Likelihood Principle, I`ll try to explain here why it is important (and if I’m … Continuar lendo
When is statistical significance not significant?
Nota: Abaixo é um texto em inglês. Como é sobre um tema de estatística, creio que dos meus 2 ou 3 leitores, 1 ou 2 talvez não leiam inglês, mas certamente não estão perdendo muita coisa. The above is the … Continuar lendo
Publicado em english, estatística, Manoel Galdino, Política e Economia
Marcado com methods, p-value, significance, statistical significance, statistics
3 Comentários
Power-law distribution and the right question
I really didn’t like this article at Forbes. I agree with the main line of the article, but not with one of the reasons to support the main argument. The central thesis is that it’s not enough to know math … Continuar lendo
Publicado em estatística, Manoel Galdino
Marcado com big data, english, Forbes, log-normal, Normal, power-law, R, statistics
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Dependencies and stationarity in time series
I really like this stuff, even though I don’t fully understand it. ps.: I already know that I’ll never know enough of statistics to understand everything in the link (it’s far away from what I study). But sometimes I wish … Continuar lendo
Publicado em estatística
Marcado com Cosma Shalizi, dependencies, ergodicity, Markov, statistics, time series
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That modeling feeling and lost in translation
With some delay, my Friday post (on Saturday!). Andrew Gelman linked to a post by Kaiser Fung in which he described three hours in the life of a statistician (or data scientist, as Fung put). The post by Fung is … Continuar lendo
Publicado em ciência, english, estatística, orquídeas selvagens, poesia
Marcado com data scientist, lost in translation, modeling, programming, statistics
1 Comentário
Marcel K.
Manoel Galdino