# Statistics for the Behavioral Sciences

Second Edition

# Multimedia links

Click on the following links - please note these will open in a new window

**Chapter 6: Probability, Normal Distributions, and**

*z*Scores**Video Clips**

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

**Audio Clips**

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

*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 Resources**

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.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.