Pearson's chi-squared test or Pearson's test is a statistical test applied to sets of categorical data to evaluate how likely it is that any observed difference between the sets arose by chance.

The Chi-square test of independence (also known as the Pearson Chi-square test, or simply the Chi-square) is one of the most useful statistics for testing hypotheses when the variables are nominal, as …

May 23, 2022 · A Pearson’s chi-square test is a statistical test for categorical data. It is used to determine whether your data are significantly different from what you expected.

What is Pearson’s Chi-Square Test? Pearson’s Chi-Square Test is a statistical method used to determine whether there is a significant association between categorical variables.

Apr 24, 2017 · Chi-squared, more properly known as Pearson's chi-square test, is a means of statistically evaluating data. It is used when categorical data from a sampling are being compared to …

Dec 15, 2025 · Whether you’re analyzing categorical data, testing for independence between variables, or assessing goodness-of-fit, the Chi-Square test provides a robust method for validating …

This is all you need to know to calculate and understand Pearson's Chi-square test for independence. It's a widely popular test because once you know the formula, it can all be done on a pocket …