Therefore 6 624 2 624 00092. Chi is a Greek symbol that looks like the letter x as we can see it in the formulas. Once we have calculated the chi-square value the next task is to compare it with the critical chi-square value.
In our simple 2x2.
Ch 2 O i E i 2 E i. To calculate the chi-square we will take the square of the difference between the. Where f o the observed frequency the observed counts in the cells and f e the expected frequency if NO relationship existed between the variables. The Chi-square test could be defined as a non-parametric test that is used to test a hypothesis about distributions of frequencies across categories of data.