Chi-squared test - Wikipedia
In the standard applications of this test, the observations are classified into mutually exclusive classes. If the null hypothesis that there are no differences between the classes in the population is true, the …
Chi-Square Statistic: How to Calculate It / Distribution
Simple explanation of chi-square statistic plus how to calculate the chi-square statistic. Free online calculators and homework help.
Chi-Square Test: Formula, Types, & Examples - Simplilearn
Dec 15, 2025 · Learn about the Chi-Square test, its formula, and types. Understand when to use the tests, chi-square distributions, and how to solve Chi-Square problems.
Chi-Square (χ2) Statistic: What It Is, Examples, How and When to Use ...
Oct 2, 2025 · Chi-square is a statistical test used to examine the differences between categorical variables from a random sample in order to judge the goodness of fit between expected and …
The Concise Guide to Chi-Square Distribution - Statology
Apr 7, 2025 · What Is Chi-Square Distribution, Really? The chi-square distribution is a continuous probability distribution that emerges when we sum squared independent standard normal random …
Chi-Square (Χ²) Tests | Types, Formula & Examples - Scribbr
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.
Chi-squared test | Definition, Formula, Types, & Facts | Britannica
Nov 27, 2025 · chi-squared test, a hypothesis-testing method in which observed frequencies are compared with expected frequencies for experimental outcomes. In hypothesis testing, data from a …
Chi-Square Test - GeeksforGeeks
Aug 2, 2025 · Chi-squared test, or χ² test, helps in determining whether these two variables are associated with each other. This test is widely used in market research, healthcare, social sciences, …
Chi-Squared Test | Brilliant Math & Science Wiki
The chi-squared test provides a way to test if an observed result (the number of heads) could feasibly have arisen randomly, or whether the original assumption (in this case of fairness) must be wrong.
What Is Chi Square Test & How To Calculate Formula Equation
Aug 29, 2023 · Chi-square (χ2) is used to test hypotheses about the distribution of observations into categories with no inherent ranking. What Is a Chi-Square Statistic?