This resource, created by author Will G. Hopkins, defines what a p-value is, why .05 is significant, and when to use it. It also covers related topics such as one-tailed/two-tailed tests and hypothesis testing. Overall,...

This page is a companion to the Exploring Patterns in Nature Curriculum Guides (see related pages) developed by the Center for Polymer Studies. It represents several basic Java Applets which illustrate basic concepts in...

This page, created by Richard Lowry of Vassar College, generates a histogram of a Poisson distribution and the associated table of probabilities. Upon opening the page, users will be prompted to enter the mean of the...

This tool lets you calculate the probability that a random variable X is in a specified range, for a variety of probability distributions for X: the normal distribution, the binomial distribution with parameters n and p,...

This page, created by Virginia Tech's Department of Statistics, provides users with a myriad of different applets presenting different probability distributions. Some of these include: binomial, Poisson, negative...