Chi-squared Distributions


In statistics, the chi-squared distribution is a continuous probability distribution that arises in the context of chi-squared tests when the null hypothesis is true. It is a special case of the gamma distribution and has only one parameter, the degrees of freedom. The chi-squared distribution is used in hypothesis testing, goodness of fit tests, and in constructing confidence intervals for variance. It is also used in various fields such as physics, engineering, and finance.


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