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).

 

 

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).