Categorical Variable: A categorical variable can be one of the variables involved in a bivariate analysis, where its categories are compared to another variable.
Scatterplot: A scatterplot is a graphical representation used to display bivariate data. It shows how two variables are related by plotting their values on a coordinate plane.
Correlation Coefficient: The correlation coefficient measures the strength and direction of the linear relationship between two quantitative variables. It ranges from -1 to 1, where -1 indicates a perfect negative relationship, 0 indicates no relationship, and 1 indicates a perfect positive relationship.