from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A test statistic that is calculated as the sum of the squares of observed values minus expected values divided by the expected values.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A test statistic used in the chi-square test.


Sorry, no etymologies found.


  • Goodness of fit between different documents was obtained by computing the so called Q value from the standard chi-square hypothesis test.

    Deconstructing Obama

  • "Using the chi-square statistic," observes one professor, "Obama's and Ayers's books were indistinguishable, while Obama's book was easily distinguishable from books by other authors."

    Archive 2009-10-01

  • I did a chi-square "goodness of fit" test and got a P value of 0.18.

    Archive 2009-03-01

  • Now, let's apply the chi-square test to each set of the following made-up numbers.

    Archive 2009-03-01

  • By a chi-square test, this has a 99% probability of indicating an increased confusion of flaunt for flout.

    Flout good taste; flaunt your excesses « Motivated Grammar

  • Rabett Labs hitched up the IBM computators bought cheap from the Manhattan Project, shanghaied recruited a bunch of young volunteers, and found that for this case Pearson's chi-square statistic is 94, which means that the probability of the null hypothesis being true is 4.5 x 10-18 or about as likely as Ethon going vegan.

    Archive 2010-01-01

  • But applying Pearson's chi-square assumes a lot more than that!

    New Year's Puzzler

  • So the result from Pearson's chi-square is correct, and we can conclude that EITHER earthquake occurrence is related to day of the week, OR earthquake occurences are correlated, or both.

    New Year's Puzzler

  • Another commenter and I did have some discussion about it a while back in which chi-square came up.

    TPM Track Composite: Obama's Big Lead Inches Up Yet Again

  • He suggested reading the Wiki article on the chi-square test.

    TPM Track Composite: Obama Ahead By More Than Eight Points


Log in or sign up to get involved in the conversation. It's quick and easy.