Multimedia links

Click on the following links - please note these will open in a new window
Chapter 3: Summarizing Data: Central Tendency
Video Clips
This video clip demonstrates how to calculate weighted means using an example (2:16).
This TEDtalk describes a landmark experiment on delayed gratification – and how it can predict future success (5:58).
Brief lecture on central tendency: mean, median, and mode (3:46).
Audio Clips
An NPR interview discusses that economic statistics usually indicate how the average person is doing – but who’s average? Sometimes the more telling statistic is the median instead of the average (4:16).
Describes how psychologists have discovered that bronze medalists tend to be more satisfied with their prize than silver medalists (3:46).
Chronic stress can lead to heart disease, cancer, and other health problems. A study shows it doesn’t matter if the stress comes from major life events or minor hassles. Time to take a deep breath? (4:32).
Web Resources
Provides examples of how to calculate the median.
Provides examples of how to calculate the mode and advantages of the mode.
A demonstration that shows how the size of the mean and median depends on the skew of the distribution.
An online simulation allows exploration various aspects of sampling distributions.