Chi-squared test - Wikipedia
Chi-squared distribution, showing χ2 on the first axis and p -value (right tail probability) on the second axis. A chi-squared test (also chi-square or χ2 test) is a statistical hypothesis test used …
Chi-squared test | Definition, Formula, Types, & Facts ...
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 …
Chi-Square (Χ²) Tests | Types, Formula & Examples - Scribbr
May 23, 2022 · What is a chi-square test? Pearson’s chi-square (Χ 2) tests, often referred to simply as chi-square tests, are among the most common nonparametric tests. Nonparametric …
Chi-Square (χ2) Statistic: What It Is, Examples, How and When ...
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 …
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 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.
The Concise Guide to Chi-Square Distribution - Statology
Apr 7, 2025 · The chi-square distribution is a continuous probability distribution that emerges when we sum squared independent standard normal random variables. It’s asymmetrical, non …