# Statistics for the Behavioral Sciences

# Video and Multimedia

Click on the following links. Please note these will open in a new window.

#### Video Links

What Is a Standard Normal Distribution?

This video provides a visual and audio description of the normal curve. This is discussed in simplified terms with drawings (4:33).

Describes *z *scores and how to find the *z *score of a data point (2:06).

An Introduction to the Normal Distribution

This video describes the normal distribution and important key points (5:26).

#### Audio Links

Put Away the Bell Curve: Most of Us Aren’t “Average”

New research suggests that rather than describe how humans perform, the bell curve may actually be constraining how people perform (4:33).

A Scientific Approach to Helping the Homeless

*New York *writer Malcolm Gladwell discusses how the homeless problem could be solved if assistance were provided to a small number of permanently homeless people (7:21).

BBC podcast that gives a historical overview of the Gaussian, or bell-shaped, distribution and how it is used today (13:49).

#### Web Links

Descriptive Statistics and Psychological Testing

This website illustrates the normal curve and discusses the meaning behind it. Also discusses scores (*T *scores, *z *scores, scaled scores) and percentiles.

This article describes the normal curve and how to find the area under the normal curve.

This article and calculator describe how to convert a *z *score to a raw score.

This article and calculator describe how to convert a raw score to a *z *score.

Normal Approximation to the Binomial

A description of the relationship between the normal distribution and the binomial distribution and how to use the normal distribution to approximate the binomial distribution are provided.