Variable
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What does it mean?
A variable is a characteristic recorded in a study. Age or travel time can be numerical; transport mode can be categorical.
Think through an example.
“Time to campus” and “transport mode” are two variables in a student survey. Belonging to the same person does not make them one variable.
Test your understanding.
Coding categories as 1 and 2 makes them quantitative variables.
Make the next connection
Explore related concepts to deepen your understanding.
Put this knowledge into practice.
Practice with short steps in related tools, then test yourself.
Practice with example data
Learn the analysis workflow before using your own data.
Take a first look at your CSV
Inspect columns and missing-value counts with Python and pandas.
Read the data dictionary before analyzing
Use the OpenAI Signals dictionary to distinguish row units, measures and comparison groups.
Sources and further reading
Explore the foundations and methodological details in these resources. Examples on this page were created for illustration.
- OpenStax Source in EnglishDefinitions of Statistics, Probability, and Key Terms