# Types of Statistics

Statistics can be further divided into two subcategories: **descriptive statistics** and **inferential statistics**.

**Descriptive statistics** are used to describe a collection of data. For example, the average age of people in a country is a descriptive statistics indicator that describes an aspect of the country's residents. Descriptive statistics on a single variable in a dataset are called **univariate analysis**, while descriptive statistics that look at two or more variables at the same time are called **multivariate analysis**. In particular, statistics that look at two variables are called **bivariate analysis**. The average age of a country is an example of univariate analysis, while an analysis examining the interaction between GDP per capita, healthcare spending per capita, and age is multivariate analysis.

In contrast, **inferential statistics** allows datasets to be collected as a sample or a small portion of measurements from a larger group, called a population....