Degrees of Freedom: Represents the number of categories that can vary freely in a statistical analysis. In the context of chi-square tests, it refers to the number of categories minus 1.
Significance Level: The level at which we decide whether to reject or fail to reject the null hypothesis. Commonly denoted as α (alpha), it is typically set at 0.05.
Expected Frequencies: The frequencies that would be expected under the assumption that there is no association between two categorical variables being analyzed using a chi-square test. These values are calculated based on proportions or probabilities from theoretical distributions or previous data.