Formulas for Statistics

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In this video, Salman Khan of Khan Academy explains alternate variance formulas.

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

Discusses Bayes' theorem in relation to mutually exclusive events and 2 ways to calculate the statement.

Flash tutorial with clear explanations about what deviation and variance mean along with how to calculate these by hand, using Excel and using the calculator.

Definition of Quartiles, Five number summary, and Boxplot Percentiles z-scores

Very comprehensive list of statistics formulas.

It also gives formulas, description, etc for statistics.

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

Central Limit Theorem Tutorial

The website provides an introduction to probability models and several applets.

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