# Video and Multimedia

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How to Calculate the Weighted Mean

This video clip demonstrates how to calculate weighted means using an example (2:16).

Joachim de Posada: Don't Eat the Marshmallow!

This TEDtalk describes a landmark experiment on delayed gratification—and how it can predict future success (5:58).

Central Tendency

Brief lecture on central tendency: mean, median, and mode (3:46).

The Median vs. The Mean in the Age of Average

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).

Exploring the Silver Medal Psyche

Describes how psychologists have discovered that bronze medalists tend to be more satisfied with their prize than silver medalists (3:46).

Best to Not Sweat the Small Stuff, Because it Could Kill You

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).

Calculate Median

Provides examples of how to calculate the median.

Statistical Mode

Provides examples of how to calculate the mode and advantages of the mode.

Mean and Median Demonstration

A demonstration that shows how the size of the mean and median depends on the skew of the distribution.

Central Tendency Simulation

An online simulation allows exploration various aspects of sampling distributions.