Directory of software for this statistical technique for modeling unmeasured categorical variables.

A framework for organizing computations around image-like, analogue representations of physical processes in data interpretation and control tasks.

A free web-based service that offers instant random sampling and random assignment for researchers. Also has a user-friendly tutorial for students.

Basic statistical concepts described in plain English. Designed for journalists or other beginners.

Searchable database of statistical information and data sources on the internet.

Online statistics demos.

Statistical methodology for the analysis of multiple informants/sources with applications to child psychopathology and gerontology.

Returns distribution values based on on-line user input for many common statistical distributions.

Directory of statistical links, organized by specialty.

Information about statistics for genetic analysis.