Usually the results will give an idea on how equal the distribution of
PR is to each and every page of your site. This criteria is determined by the structure of inbound links linking all your other pages and making it
SEO friendly for visitors arriving at your site to navigate around.
Some webmasters often make a mistake by solely work on the root page of a site for the purpose of search engine optimization. In fact to make it
SEO friendly, one must consider to optimize each page of a site for different search phrases and then link all of them together.
I can't tell you exactly how the algorithms work but what you need to do is check and make sure every page can be link to each other.