Hypothesis testing glossary

The University of Lancaster in England has developed an online glossary, for easy lookup of many of the terms used in this class. It is a good reference or check to make sure whether you know a definition.

Another dictionary of statistical terminology. This one, from Montana State University is down home and funky, but complete.

Correlation
Hyperstat's section on correlation .Notice the formula for r has several guises. They are really all the same calculation.
Carl Pearson developed the correlation coefficient. He also developed the Chi-square  test. As with Galton (see below), who developed regression, Pearson worked in genetics (eugenics).

Regression

This linear regression tutorial shows reviews the theory and shows you how to use excel to solve linear regression problems.
Here's a multiple regression tutorial for the TI-83.
The history of statistics is outlined in this web page from UCLA. This includes Francis Galton's (1886) first use of regression.
A more detailed description of how regression was developed by Galton and Pearson. It shows how much we take for granted now knowing the relationship of the normal and t distributions.

Web-based calculators

A list of all kinds of calculator links is provided by David Lane.

A t-distribution calculator I like gives and shows you the area under the t between any two points. It has slider bars for changing the boundaries and the degrees of freedom. It is pretty easy to use.

Hyperstat has calculators for all kinds of distributions.