Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Normal Distribution Utility
The learning tool calculates the probability of a normal distribution.
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Normal Distribution Table
The resource consists of a normal distribution table.
Interactive Mathematics
Interactive Mathematics: The Normal Distribution
Formulas and properties of the normal distribution are presented, including details on the normal random variable and the standard normal distribution. Several real world examples are also included with detailed solutions.
National Council of Teachers of Mathematics
The Math Forum: Understanding Standard Deviation
MathForum answers a question on variance and standard deviation.
United Nations
Unesco: Measures of Dispersion
Explanation of the different measures of dispersion (range, interquartile range, and standard deviation) are given.
BBC
Bbc: Standard Deviation
A demonstration of how to find the standard deviation of a set of data. Several examples and a practice test are offered.
University of Glasgow
Steps Statistics Glossary: Normal Distribution
Overview of normal distribution, including the normal distribution model, the probability density function, and standard normal distribution. The parameters for "normal" distribution are provided.
Calculator Soup
Calculator Soup: Standard Deviation Calculator
Standard deviation is a statistical measure of diversity or variability in a data set. A low standard deviation indicates that data points are generally close to the mean or the average value. A high standard deviation indicates greater...
Calculator Soup
Calculator Soup: Variance Calculator
Variance is a measure of dispersion of data points from the mean. Low variance indicates that data points are generally similar and do not vary widely from the mean. High variance indicates that data values have greater variability and...
Other
Berrie's Statistics Page: Normal Distribution
Site discusses the normal distribution as well as the mean and variance in the normal distribution. A link is provided for a QuickTime activity to adjust the mean.