chi-by-eye: difference between revisions
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# {{lb|en|humorous}} the practice of deciding between statistical models based on a plot, rather than a formal test. |
# {{lb|en|humorous}} the practice of deciding between statistical models based on a plot, rather than a formal test. |
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#* {{quote-text|en|year=2007|author=William H. Press, Saul A. Teukolsky, William T. Vetterling, Brian P. Flannery|title=Numerical Recipes: The Art of Scientific Computing|page=774|passage=They deem a fit acceptable if a graph of data and model "looks good." This approach is known as '''''chi-by-eye'''''. Luckily, its practitioners get what they deserve.}} |
#* {{quote-text|en|year=2007|author=William H. Press, Saul A. Teukolsky, William T. Vetterling, Brian P. Flannery|title=Numerical Recipes: The Art of Scientific Computing|page=774|passage=They deem a fit acceptable if a graph of data and model "looks good." This approach is known as '''''chi-by-eye'''''. Luckily, its practitioners get what they deserve.}} |
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#* {{quote-text|en|year=2011|author=Steven P. Greiner|title=Ben Graham Was a Quant : Raising the IQ of the Intelligent Investor|passage=Their business prospects and earnings are correlated, and this can be observed by visually plotting their stock prices. Statisticians often call this "'''chi by eye'''."}} |
#* {{quote-text|en|year=2011|author=Steven P. Greiner|title=Ben Graham Was a Quant : Raising the IQ of the Intelligent Investor|page=16|passage=Their business prospects and earnings are correlated, and this can be observed by visually plotting their stock prices. Statisticians often call this "'''chi by eye'''."}} |
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Revision as of 14:59, 2 May 2020
English
Etymology
Alluding to the χ2 test ("chi squared test") used to formally test a statistical hypothesis.
Noun
chi-by-eye (uncountable)
- (humorous) the practice of deciding between statistical models based on a plot, rather than a formal test.
- 2007, William H. Press, Saul A. Teukolsky, William T. Vetterling, Brian P. Flannery, Numerical Recipes: The Art of Scientific Computing, page 774:
- They deem a fit acceptable if a graph of data and model "looks good." This approach is known as chi-by-eye. Luckily, its practitioners get what they deserve.
- 2011, Steven P. Greiner, Ben Graham Was a Quant : Raising the IQ of the Intelligent Investor, page 16:
- Their business prospects and earnings are correlated, and this can be observed by visually plotting their stock prices. Statisticians often call this "chi by eye."