Confidence Interval

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You can search this electronic textbook for statistics topics including ANOVA, linear regression models, the effects of outliers, confidence intervals, etc. Gives explanations and discusses the topics.

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

Online Textbook for a variety of statistical tests

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

Very comprehensive list of statistics formulas.

The website indexes lectures in Introduction to Statistical Methods course.

Site gives detailed explanation of what a confidence interval implies and how to construct one.

Description of the Confidence Interval with Normal distribution. Advanced

Includes the defintion and formulas for confidence intervals as well as some examples and visual references.