It is one thing to run a test using a computer package and another to understand what hypothesis testing is about and how to interpret your output.  As a primer, please have a look at the presentation Principles of statistical inference: hypothesis testing, below.

This presentation also refers to the a useful website on the logic of hypothesis testing with exercises for you to test your knowledge. The relevant link has now been updated (choose  11. Logic of Hypothesis Testing).   The presentation also contains a handy Statistics glossary with a highly relevant section on Hypothesis testing.

Getting to Grips with Hypothesis Testing by Margaret MacDougall is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.