calaculate Statistical significance

Click on the following link, there you'll find a statitical significance test for testing two adwords ads based on Clicks & Click Through Rate. I want to know exactly how this test works. I want an example which demonstrates al the steps to calculating the statitical significance using the ad testing as the example. If you're interested in this project please describe what you will deliver upon completion. If you have any question at all dont hesitate to ask! Thanks, [login to view URL]