Just a very short message to direct you to my article on statistical significance over on the Kissmetrics blog. The emphasis is on intuitive means to understanding the key ideas.
Check Out My Guide to Statistical Significance on Kissmetrics
Fun, example-filled guide, aimed at building intuition
More Articles: Click here for full archive
You need to bake two things into the heart of your web app: keywords and a clever scalable content creation strategy
Tips for image choice, headline, and the body
A High-Level Catalogue of The Main Areas to Fiddle With When Optimizing Your Conversion Rate