Chi-square distribution comes under the category of continuous probability distribution. It was first introduced by the Helmert [1875] and then re-modified and introduced by Karl Pearson [1900].

The Chi-square distribution can be mathematically defined as follows:

and ν is called the degree of freedom. The *x _{i}* are normally and independently distributed with means μ

It is denoted by the Greek letter *χ*^{2} [chi-squared].

Let *X *be a normally distributed random variable with mean *μ* and *SD σ.*

Let us draw a large number of independent random samples of size* n* from this population. Convert each value of *x _{i }*within ...

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