Free Statistics Help Book
An Interactive Multimedia introductory-level statistics book.
The book features interactive demos, simulations and case studies.
Chapter
Section
Summarizing Distributions :  

Central Tendency



Prerequisite
None


1. What is Central Tendency
2. Measures of Central Tendency
3. Balance Scale Simulation
4. Absolute Difference Simulation
5. Squared Differences Simulation
6. Median and Mean
7. Mean and Median Simulation
8. Additional Measures
9. Comparing Measures


Central tendency is a loosely defined concept that has to do with the location of the center of a distribution. The section “What is Central Tendency” presents three definitions of the center of a distribution. “Measures of Central Tendency” presents the three most common measures of the center of the distribution. The three simulations that follow relate the definitions of the center of a distribution to the commonly used measures of central tendency. The findings from these simulations are summarized in the section “Mean and Median.” The “Mean and Median” allows you to explore how the relative size of the mean and the median depends on the skew of the distribution.


Less frequently used measures of central tendency can be valuable supplements to the more commonly used measures. Some of these measures are presented in “Additional Measures.” Finally, the last section compares and summarizes differences among measures of central tendency.
Copyright 2012