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About: Zero degrees of freedom     Goto   Sponge   NotDistinct   Permalink

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In statistics, the non-central chi-squared distribution with zero degrees of freedom can be used in testing the null hypothesis that a sample is from a uniform distribution on the interval (0, 1). This distribution was introduced by Andrew F. Siegel in 1979. The chi-squared distribution with n degrees of freedom is the probability distribution of the sum where However, if and are independent, then the sum of squares above has a non-central chi-squared distribution with n degrees of freedom and "noncentrality parameter"