Click on the following links. Please note these will open in a new window.

This website provides an overview of null hypotheses and test procedures.

This article gives insight into a real-world issue about p values: the misuse of p values to determine if medical and other scientific studies are valid.

This website provides graphical explanation of power functions.

This video from PBS gives examples of null and alternate hypotheses.

This website gives several helpful charts and graphs about determining type I and type II errors.