Types of Variables

Types of Variables

In the last section you reviewed qualitative and quantitative data.  Surveys primarily collect quantitative data, so the rest of this module will focus on analyzing quantitative data.

Surveys can contain many kinds of questions; these questions are often called variables. There are some basic types of variables. It is important to understand the different types of variables, because the type of variable can lead to different kinds of data and guide your analysis. The following are types of variables:

There are three types of categorical variables:


Categorical Variables

  • Binary
  • Practical
  • Ordinal


There are two types of continuous variables:


Continuous Variables

  • Interval
  • Ratio


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