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Math/Statistics

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Read more about the article Interactive statistics: breeding’s equation AKA regression towards the mean

Interactive statistics: breeding’s equation AKA regression towards the mean

  • Post author:Emil O. W. Kirkegaard
  • Post published:19. January 2023
  • Post category:Math/Statistics

One of the things I did to teach myself R programming was to create a bunch of interactive statistics tools written using the awesome R Shiny package. These are still…

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Read more about the article Economics research is mostly untrustworthy because economists cheat so much with the statistics

Economics research is mostly untrustworthy because economists cheat so much with the statistics

  • Post author:Emil O. W. Kirkegaard
  • Post published:11. December 2022
  • Post category:Economics/Math/Statistics/Metascience

I recently posted a book review of Garett Jones' 10% less Democracy. My main beef with the book is that it relies on lots of studies with dubious p values,…

Continue ReadingEconomics research is mostly untrustworthy because economists cheat so much with the statistics
Read more about the article Variance explained is mostly bad

Variance explained is mostly bad

  • Post author:Emil O. W. Kirkegaard
  • Post published:21. October 2022
  • Post category:Genetics / behavioral genetics/Math/Statistics

Reporting the proportion of variance explained by some statistical model is ubiquitous. However, just like p-values, it is a misleading metric. I'll try explain why it is used, and why…

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Read more about the article African IQs using only age heaping data

African IQs using only age heaping data

  • Post author:Emil O. W. Kirkegaard
  • Post published:17. August 2022
  • Post category:intelligence / IQ / cognitive ability/Math/Statistics

Age heaping is a fascinating method. I blogged about it back in 2015, hoping that someone would take up the idea of fusing this literature from historical economics with modern…

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Read more about the article The signal and the noise in meta-analysis

The signal and the noise in meta-analysis

  • Post author:Emil O. W. Kirkegaard
  • Post published:6. August 2022
  • Post category:Math/Statistics

OK, it has been written about already by some others, but I also want to talk about this John Protzko pile-on: https://twitter.com/JProtzko/status/1554112968245137408 Here's the original plot in case the tweet…

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Read more about the article R for machine learning and other stuff

R for machine learning and other stuff

  • Post author:Emil O. W. Kirkegaard
  • Post published:4. August 2022
  • Post category:Math/Statistics/R

One of the best things about R is that there is a never-ending stream of new short textbooks being written. Most of these are now written using the neat bookdown…

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Read more about the article p > .05 thus no effect thus familial confounding fallacies

p > .05 thus no effect thus familial confounding fallacies

  • Post author:Emil O. W. Kirkegaard
  • Post published:3. October 2021
  • Post category:Genetics / behavioral genetics/Math/Statistics

Reading over some sibling control studies, BIG TOUGH GUY mentioned this quite wrong study: Meier, S. M., Mors, O., & Parner, E. (2017). Familial confounding of the association between maternal…

Continue Readingp > .05 thus no effect thus familial confounding fallacies
Read more about the article Review: Psychological Testing: Theory and Practice (Colin Cooper)

Review: Psychological Testing: Theory and Practice (Colin Cooper)

  • Post author:Emil O. W. Kirkegaard
  • Post published:8. July 2020
  • Post category:Book review/Math/Statistics/Psychology

Cooper, C. (2018). Psychological testing: theory and practice. Routledge. This is a pretty food good introduction to psychometrics (the science of psychological measurement). There is the now customary dislike for…

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Read more about the article Self-teaching stats with R in 2020

Self-teaching stats with R in 2020

  • Post author:Emil O. W. Kirkegaard
  • Post published:26. June 2020
  • Post category:Math/Statistics

See 2019 post on introductions to psychology etc. for broader coverage Anon asks me today: What would be the best way to quickly self-teach enough statistics to be able to…

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Read more about the article Lynn’s impossible regression values: bounded outcome variables with OLS

Lynn’s impossible regression values: bounded outcome variables with OLS

  • Post author:Emil O. W. Kirkegaard
  • Post published:13. May 2020
  • Post category:intelligence / IQ / cognitive ability/Math/Statistics

Someone emails me: Hello Mr. Kirkegaard, This is a question I emailed to Richard Lynn about data in regression analysis in his book Intelligence that did not make sense to…

Continue ReadingLynn’s impossible regression values: bounded outcome variables with OLS
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