## Chi-square test of goodness of fit with examples

Chi-square test of goodness of fit Chi-square test of goodness of fit is a non-parametric test. One of the principle use of $\chi^2$-distribution is to test how well an observed distribution fits to a theoretical one. That is, the chi-square test of goodness of fit enables us to compare the distribution of classes of observations …

## Chi-square test for variance

Testing variance or standard deviation In this tutorial we will discuss a method for testing a claim made about the population variance $\sigma^2$ or population standard deviation $\sigma$. To test the claim about the population variance or population standard deviation we use chi-square test. We will explain the six steps approach used in hypothesis testing …