kids encyclopedia robot

Chi-square distribution facts for kids

Kids Encyclopedia Facts
For other uses, see Chi.

In probability theory and statistics, the chi-square distribution is one of the most widely used theoretical probability distributions. It is used in statistical significance tests. It is useful, because it is relatively easy to show that certain probability distributions come close to it, under certain conditions. One of these conditions is that the null hypothesis must be true. Another one is that the different random variables (or observations) must be independent of each other.

Images for kids

  • Chernoff XS CDF

    Chernoff bound for the CDF and tail (1-CDF) of a chi-squared random variable with ten degrees of freedom (k = 10)

  • Chi on SAS

    Approximate formula for median compared with numerical quantile (top). Difference between numerical quantile and approximate formula (bottom).

  • Chi-square distributionCDF
  • Chi-square distributionPDF
kids search engine
All content from Kiddle encyclopedia articles (including the article images and facts) can be freely used under Attribution-ShareAlike license, unless stated otherwise. Cite this article:
Chi-square distribution Facts for Kids. Kiddle Encyclopedia.