1. They are scholarly articles.
2. They may have these sections:
METHODOLOGY or METHODS
3. They describe an experiment or an observational study
4. They have statistical analysis!
Articles that contain statistical analyses are usually scholarly (or academic or peer-reviewed) articles that describe experimental or observational research results.
They are also called empirical articles.
Empirical articles are common in the sciences and social sciences fields.
Watch this 10-minute YouTube video for help recognizing empirical articles.