In probability theory and statistics, the -distribution with degrees of freedom is the distribution of a sum of the squares of independent standard normal random variables. [2] The chi-squared distribution is a …

Jan 7, 2026 · 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 …

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 …

Oct 2, 2025 · A chi-square (χ2) statistic is a test that is used to measure how expectations compare to actual observed data or model results.

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

May 23, 2022 · The chi-square test of independence is used to test whether two categorical variables are related to each other. Chi-square is often written as Χ 2 and is pronounced “kai-square” (rhymes …

Aug 29, 2023 · The Chi-square test is a statistical method used to determine if there's a significant association between two categorical variables in a sample.

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-negative, and …

Dec 15, 2025 · This tutorial will guide you through the fundamentals of the Chi-Square test, including its formula, different types, and real-world applications. By the end, you'll understand the chi-square test …

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.