Chi^2(k')
In probability theory and statistics, the chi-squared distribution (also chi-square or \chi^2-distribution) with k Degrees of freedom (statistics), degrees of freedom is the distribution of a sum of the squares of k Independence (probability theory), independent standard normal random variables. The chi-squared distribution is a special case of the gamma distribution and is one of the most widely used probability distributions in inferential statistics, notably in hypothesis testing and in construction of confidence intervals. This distribution is sometimes called the central chi-squared distribution, a special case of the more general noncentral chi-squared distribution. The chi-squared distribution is used in the common chi-squared tests for goodness of fit of an observed distribution to a theoretical one, the statistical independence, independence of two criteria of classification of data analysis, qualitative data, and in confidence interval estimation for a population stand ...
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Chi-square Pdf
The term chi-square, chi-squared, or \chi^2 has various uses in statistics: *chi-square distribution, a continuous probability distribution *chi-square test A chi-squared test (also chi-square or test) is a statistical hypothesis test used in the analysis of contingency tables when the sample sizes are large. In simpler terms, this test is primarily used to examine whether two categorical variabl ..., name given to some tests using chi-square distribution * chi-square target models, a mathematical model used in radar cross-section {{disambiguation ...
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