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A helpful scientific calculator that runs in your web browser window.

This site is designed to provide information, demonstrations, links and quizzes associated with the statistics and statistical methods for research design and analysis. It includes tuorials and applets

An online statistics book with links to other statistics resources on the web.

The website indexes lectures in Introduction to Statistical Methods course.

Statistics: Power from Data! is a product from Statistics Canada that will assist readers in getting the most from statistics. Each chapter is intended to be complete in itself, allowing users to go directly to the topic they wish to learn more about without reading all of the previous sections.

Definition of Error

Probable Error Formula using the normal distribution function