Department of Labor Logo United States Department of Labor
Dot gov

The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

December 1987

What is the effect of random variation in State unemployment rates?

Edward W. Hill

State and local users of the data may tend to assume that the rates have low levels of dispersion; however, a closer analysis reveals large variances attributed to sample size.

Download PDF »