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About: Reduced chi-squared statistic     Goto   Sponge   NotDistinct   Permalink

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In statistics, the reduced chi-square statistic is used extensively in goodness of fit testing. It is also known as mean squared weighted deviation (MSWD) in isotopic dating and variance of unit weight in the context of weighted least squares. Its square root is called regression standard error, standard error of the regression, or standard error of the equation(see Ordinary least squares#Reduced chi-squared)