The Chi-squared distribution, with degrees of freedom $k$, describes the distribution of $\displaystyle \sum_{1=1}^{k} Z_k^2$ values, where $Z_k$ represents any value ...

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What is the chi-squared test? The chi-squared test, often written as χ 2 test, is a statistical hypothesis test used in the analysis of categorical variables to determine whether observed data are ...

The chi-square test is an essential tool in statistics that allows researchers to compare observed and expected frequencies of categorical variables. One of the fundamental steps in conducting a ...

Recall that a chi-squared test of independence can be used for two categorical variables and write down the null hypothesis for this test Explain the basic idea of a chi-squared test, namely that the ...