Data Analysis
  Business & Economics

  10 - 12 Grades Social Science
This module is part of a series produced at The Universtiy of Nevada at Reno for the National Numeracy Network under a grant from the Woodrow Wilson Fellowship Foundation through the National Council on Education and the Disciplines. These brief modules are envisioned as a resource for teachers to use in a classroom setting and also for quantitative literacy workshops for teachers. Each module typically contains one or two examples related to "real world" quantitative literacy issues and includes exercises for students. There is also a section "for the instructor" that contains discussions of some of the topics, solutions to the exercises, and resources for further explorations.


Misleading Averages
Jerry Johnson
Universtity of Nevada

The average (or mean) of a list of numbers is their sum divided by the number of numbers in the set. What about an average rate, such as an average percent? For example how does one define the average rate of taxation of a group of people? We will see that averages can be misleading especially if one is not careful about what an average rate means.

The Mathematics involved is arithmetic, percents and averages. Suggested grade levels: 11 and up due to subject matter and reading levels.