Chi-Square Curve - Definition & Meaning

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The distribution of the chi-square statistic is called the chi-square distribution. In a statistical experiment of a random sample of size n, having a standard deviation equal to σ, the standard deviation of the sample is equal to s.

A detail of the Chi-square distribution and its tails, used in

Chi-Squared Distribution -- from Wolfram MathWorld

Chi-Square (Χ²) Distributions

Chi square

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Chi-Square (Χ²) Distributions

Chi square

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Chi-Square Calculator

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Schematic example of the chi-square test on the Poisson variable

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