How to Confirm a SEO Theory
Search Engine Optimization is a topic with many unknown variables. Google doesn’t divulge how their search engine works and many try and solve the mystery. Because of that there are plenty of ideas that are often unproved. The way to check those hypotheses is to perform a sequence of tests like Commission Blueprint did with their PR to content link test. They have tested hundreds of sites over a period of a year. This kind of test is statistically significant and proves the idea. In this case, BTW, the relationship of PR and content was shown to be non-existent.