- Free Articles
- Astrology of Mandalas Encyclopedia of Psychology and Religion
- Anthropomorphism Encyclopedia of Psychology and Religion
- Mandalas Encyclopedia of Psychology and Religion
- Quantum Chaos Encyclopedia of Complexity and Systems Science
- Carbohydrate-Metal Complexes: Structural Chemistry of Stable Solution Species Glycoscience
**More Free Articles**

This is the free portion of the full article.
The full article
is available to licensed users only.

How do I get access?

# Normal Curve

## Synonyms

## Definition

The normal curve is a theoretical, bell-shaped distribution thought to describe the frequency of occurrence of many natural phenomena, including such varied things as height, blood pressure, reaction time, and scores on cognitive tests. Further, it serves as a mathematical model for describing random events in probability and statistics. http://mathworld.wolfram.com/classroom/classes/ProbabilityandStatistics.html, retrieved on 8/29/08

## Characteristics

### History

Mathematician Abraham de Moivre published an article on the curve in 1733 as a way to approximate the binomial distribution. This account latter appeared in his book on probability theory, *The Doctrine of Chances* (1738). Another Frenchman, Pierre-Simon Laplace, made use of the curve in describing the distribution of random errors (1783), and