Chi-square formula is a statistical formula to compare two or more statistical data sets. It is used for data that consist of variables distributed across various categories and is denoted by χ 2.

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 …

Aug 29, 2023 · Compute the Chi-square statistic using the formula: Χ² = Σ [ (O_i – E_i)² / E_i ], where O_i is the observed frequency and E_i is the expected frequency. 4.

Simple explanation of chi-square statistic plus how to calculate the chi-square statistic. Free online calculators and homework help.

Nov 11, 2025 · The Chi-Square test is a statistical procedure for determining the difference between observed and expected data. It can also be used to decide whether the data …

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 …

Sep 26, 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 …

Oct 2, 2025 · Chi-square is a statistical measurement that shows how well a model fits the observed data. What Is a Chi-Square (χ2) Statistic? A chi-square (χ2) statistic is a test that …

In this article, we'll progress logically through the essential components of chi-square testing, equipping you with both theoretical understanding and practical skills.

Free chi-square calculator to compute chi-square test statistic, p-value, and determine statistical significance. Test independence and goodness-of-fit with ...