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-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 in the …

Nov 27, 2025 · The formula for the chi-squared test is χ 2 = Σ (Oi − Ei)2/ Ei, where χ 2 represents the chi-squared value, Oi represents the observed value, Ei represents the expected value (that is, the …

May 23, 2022 · Calculate the chi-square value from your observed and expected frequencies using the chi-square formula. Find the critical chi-square value in a chi-square critical value table or using …

Chi square formula is used to compare two or more statistical data sets. Understand the Chi Square Formula with Applications, Examples, and FAQs.

So how do we calculate this p-value? We use the Chi-Square Test! Note: Chi Sounds like "Hi" but with a K, so it sounds like " Ki square" And Chi is the greek letter Χ, so we can also write it Χ2. Important …

Learn chi-square test fundamentals, formula derivation and step-by-step problem solving to enhance your statistics skills.

There are two types of chi-square tests. Both use the chi-square statistic and distribution for different purposes: A chi-square goodness of fit test determines if sample data matches a population. For …

Aug 29, 2023 · There are three main types of Chi-square tests, tests of goodness of fit, the test of independence, and the test for homogeneity. All three tests rely on the same formula to compute a …

Welcome to this comprehensive guide on Chi‑Square (χ²) tests, essential tools in statistics for analyzing categorical data.